34 posts categorized "Reference list"

April 12, 2017

How to Alphabetize a Number

Chelsea blog 2 by Chelsea Lee

If a reference list entry begins with a number (as might be the case for a reference with no author), you should alphabetize the entry in the reference list as though the number were spelled out. So in the following example, the reference that begins with 50 would be alphabetized as though 50 were written fifty.

Farthing, T., & Oates, P. P. (2010). The compendium of kittens (2nd ed.). New York, NY: Cat Press.

50 ways to improve your life with cats. (2017). Retrieved from http://www.catimprovement.com/50ways

French, J. S. (2015). Purr-fect: A book about cats. New York, NY: Cat Press.

For numbers that represent years, use the way the year is commonly said to alphabetize the reference. For example, a reference beginning with 1984 would be alphabetized as though it were written nineteen eighty-four, not one thousand nine hundred eighty-four.

In the text, cite references beginning with a number with the first two pieces of the reference list entry: here, that's the title and the year because the reference has no author. If the title in the reference list is nonitalic, put the title in double quotation marks in the in-text citation and captialize it using title case; if the title in the reference list is italic, keep the title in italics in the in-text citation and capitalize it using title case. If the title is long, you can use just the first few words.

Example in-text citation: ("50 Ways," 2017)

 Got other numerical alphabetization questions? Ask away in the comments section.

Foam-numbers-540604726_1027x1027

August 15, 2016

Periods in Reference List Entries

Chelsea blog 2
by Chelsea Lee

APA Style references have four parts: author, date, title, and source, and these parts are separated by periods. This example of a book reference shows the pattern (the periods are highlighted to help you see them):

Author, A. (2017). Title of book. Publisher Location: Publisher Name.

Some cases can cause some confusion, however, such as group authors, screen names, and titles ending in punctuation such as question marks. Read on to learn how to handle reference punctuation in those cases.

Group Authors

When the author of a work is a group, add a period after the group name to end the author portion of the reference.

Community Preventive Services Task Force. (2015). Clinical decision support systems recommended to prevent cardiovascular disease. American Journal of Preventive Medicine, 49, 796–799. http://dx.doi.org/10.1016/j.amepre.2015.03.041

Screen Names

When a user has a screen name as well as a real name (as with many social media references), put a period after the closing brackets that enclose the screen name (but do not put a period between the real name and the screen name).

Stanford Medicine [SUMedicine]. (2012, October 9). Animal study shows sleeping brain behaves as if it's remembering: http://stan.md/RrqyEt #sleep #neuroscience #research [Tweet]. Retrieved from https://twitter.com/SUMedicine/status/255644688630046720

Titles Ending in Punctuation

When the title of a work ends with a punctuation mark, such as a question mark or exclamation point, this punctuation mark takes the place of the period that would otherwise be added at the end of the title.

Millon, T. (2016). What is a personality disorder? Journal of Personality Disorders, 30, 289–306. http://dx.doi.org/10.1521/pedi.2016.30.3.289

References Ending in a DOI or URL

One case where you should never add a period is after a DOI or URL. This is to prevent the impression that the period is part of the DOI or URL (which would then prevent it from working).

Do you have other reference-punctuation questions? Leave them as a comment below.

Puzzle pieces

October 05, 2015

The Myth of the Off-Limits Source

Chelsea blog 2by Chelsea Lee

Proper citation is an important component of any APA Style paper. However, many readers believe certain sources aren’t allowed in APA Style, and they write to us looking for a definitive list of what is off limits. Two of the most common questions are about whether it’s okay to cite websites and whether sources have to have been published within a certain time frame to be cited, such as the last 5 or 10 years.

Do not write sign

Let’s set the record straight: Anything that a reader can retrieve, you can cite as a source in an APA Style reference list. Things the reader can’t retrieve (like a conversation, an unrecorded webinar, or a personal e-mail) can be cited as personal communications (see PM § 6.20). And there are no limits on the age of sources.

But just because you can cite anything as a source doesn’t mean you should. Rather, APA recommends that sources be reliable, primary accounts that represent the most up-to-date information wherever possible. Let’s look at each of these aspects in more detail.

Reliable Sources

A reliable source is one you can trust. Two indicators of reliability are the expertise of the author and the vetting standards of the place of publication. For example, an article written by a researcher and published in a peer-reviewed journal is likely to contain reliable information and thus would make a good source. On the other hand, a random website written by an unknown person, for example, is less likely to be reliable, and thus we would not recommend you cite this source unless you have a good reason (e.g., to talk about the source’s unreliability) or you verify the information yourself using other reliable sources.

However, the mere fact that information is published online is not reason to dismiss it as unreliable. Many scientific, medical, and governmental organizations—such as the Centers for Disease Control and Prevention (CDC), National Institutes of Health, U.S. Census Bureau, and even the APA—publish reliable information on their websites and social media sites. Scientists and research organizations might publish blogs or YouTube videos that are worth citing. Evaluate each source on its own merits for reliability when determining whether to cite it in a paper.

Primary Sources

A primary source presents information gathered firsthand, such as the results of an experiment or data from a survey. Secondary sources present information secondhand—an example would be a textbook summary of a topic or a Wikipedia article. APA recommends citing primary sources whenever possible, because this allows you to verify the accuracy and completeness of the information yourself rather than rely on someone else to do this for you. Secondary sources can be reliable, but it is a best practice of scholarly writing to investigate for yourself if you can. See here and here for more information on primary and secondary sources.

Up-to-Date Sources

APA recommends that you use the most up-to-date research you can find on your topic. However, the meaning of up-to-date will vary depending on the field. Some fields develop faster than others, and even within a field, some information will remain relevant for a long time, whereas other information will become outdated. For example, foundational works may be quite old but still worth citing when you are establishing the context for your own work. There is no year-related cutoff where sources must be published within the past x number of years to be used in a paper. Each source must be evaluated on a case-by-case basis to determine whether the information in it is timely and relevant.

If you have further questions about choosing sources for an APA Style paper, leave a comment below. 

November 20, 2014

How to Cite Multiple Pages From the Same Website

Timothy McAdoo

by Timothy McAdoo

Sometimes one's research relies on a very narrow thread of the World Wide Web.

What do I mean? We are sometimes asked how to cite multiple web pages from the same website. “Can’t I just cite the entire website?” our efficiency-minded readers ask. If you merely mention a website, yes.

But, if you quote or paraphrase information from individual pages on a website, create a unique reference for each one. This allows your reader to find your exact source. This may mean your reference list contains a number of references with similar, but distinct, URLs. That’s okay!

Laptop-filesLet’s look at an example:

Say you are writing a paper about Division 47 (Exercise and Sport Psychology) of the American Psychological Association (APA). In your paper, you begin by providing some background information about APA and about APA’s divisions, and then you provide more detailed information about Division 47 itself. In the process, you might quote or paraphrase from a number of pages on the APA website, and your reference list would include a unique reference for each.

American Psychological Association. (n.d.-a). Divisions. Retrieved from http://www.apa.org/about/division/
American Psychological Association. (n.d.-b). Exercise and Sport Psychology. Retrieved from http://www.apa.org/about/division/div47.aspx
American Psychological Association. (n.d.-c). For division leaders. Retrieved from http://www.apa.org/about/division/officers/index.aspx
American Psychological Association. (n.d.-d). For division members. Retrieved from http://www.apa.org/about/division/activities/index.aspx
American Psychological Association. (n.d.-e). Sample articles. Retrieved from http://www.apa.org/pubs/journals/spy/sample.aspx

It may seems a little unusual to have so many similar references, but in the context of this research topic, it makes perfect sense.

In-Text Citations

When you quote directly from a web page, be sure to include the paragraph number, in lieu of a page number, with the in-text citation. You may also include a paragraph number when paraphrasing. This will help readers locate the part of the page you are relying on.

Related Readings

May 15, 2014

Comparing MLA and APA: The Reference List

David Becker



By David Becker

Today, we continue with our series of posts highlighting some differences between APA and MLA reference styles. Last week, I outlined how the two styles handle in-text citations. Today’s post focuses on the reference list (or the “Works Cited” list as it is called in MLA Style). Below are examples of how each style would handle two common sources—a print book and a journal article from a research database. I have color coded the text to help you better visualize the differences in the basic elements of a generic reference. The who is in red, the when is in blue, the what is in yellow, and the where is in purple, all of which can be mixed and matched to form the Frankenreference.

Let’s begin with a print book, one of the simplest sources to cite:

MLA

Gordin, Michael D. The Pseudoscience Wars: Immanuel Velikovsky and the Birth of the Modern Fringe. Chicago: U Chicago P, 2012. Print.

APA

Gordin, M. D. (2012). The pseudoscience wars: Immanuel Velikovsky and the birth of the modern fringe. Chicago, IL: University of Chicago Press.

The two styles vary in a number of ways, including punctuation, capitalization, and placement of the date. Also, unlike APA Style, MLA Style includes the format of the source—either “Print” or “Web”—as an extra piece of “where” information, and it often requires writers to abbreviate publisher names.

Now let’s take a look at something a bit more complicated, a journal article from a research database:

MLA

Shafron, Gavin Ryan, and Mitchell P. Karno. “Heavy Metal Music and Emotional Dysphoria Among Listeners.” Psychology of Popular Media Culture 2.2 (2013): 74-85. PsycNET. Web. 11 Feb. 2014.

APA

Shafron, G. R., & Karno, M. P. (2013). Heavy metal music and emotional dysphoria among listeners. Psychology of Popular Media Culture, 2, 74–85. doi:10.1037/a0031722

The most substantive difference is that MLA Style requires the name of the database from which you retrieved the article and the date of retrieval as well; it does not use the DOI. In contrast, APA Style requires a DOI (when there is one), but doesn’t require the date of access (see p. 198 of the Publication Manual for more detail). In most cases, the name of the database is not used in an APA Style reference, although a few exceptions are outlined in Chapter 7.

Understanding Style

I hope this comparison of MLA and APA styles is helpful to those of you who find yourself transitioning from one to the other. If you are a student switching from MLA to APA, your most important resources will be the Publication Manual and this blog. I also recommend that you try our free tutorial on the basics of APA Style and visit our FAQ page, in addition to our pages on quick answers for citing sources and formatting your research paper. If you have any questions after checking those resources, you can contact APA Style directly or find us on Facebook and Twitter.

April 24, 2014

Why Does APA Style Use Hanging Indents?

Jeffby Jeff Hume-Pratuch

 

Dear Style Experts,

I’m curious about how certain things got to be that way in APA Style. For example, how did you decide on using a hanging indent for references? Does this improve the readability of the paragraph, compared with some other way of offsetting the information? Or is there some other advantage to the hanging indent, beyond readability?
                                                                                              —Chris in Canada

Dear Chris,

To answer that question, we need to set the dial on the Wayback Machine for 1894, when the first issue of Psychological Review (APA’s first journal) was published. As you can see from the snapshot below, the references in that issue were not exactly formatted in the APA Style we know and love, but they do use a hanging indent. So you might say that the hanging indent is part of our DNA.


1894PsycReview


DNA_double_helix_vertikalAPA Style (like every other reference style) is less like a purpose-built machine and more like a set of family traditions. Some features, such as the DOI, have been added over the years for carefully articulated reasons; others, like the hanging indent, appeared unannounced. Taken together, they constitute “a standard of procedure . . . to which reference might be made in cases of doubt, and which might be cited to authors for their general guidance in the preparation of scientific articles” (Bentley et al., 1929, p. 57).


When Bentley et al. wrote that sentence in 1929, they probably did not suspect that the standard they outlined in seven pages would grow to embrace six editions, several revisions, and a host of supporting products, including this blog. I think it’s pretty cool to be part of something that has its roots in the Victorian Era and its head in the 21st century. That’s my kind of family tree!

 

References

Bentley, M., Peerenboom, C. A., Hodge, F. W., Passano, E. B., Warren,
     H. C., & Washburn, M. F. (1929). Instructions in regard to
     preparation of manuscript. Psychological Bulletin, 26, 57-63.
     doi:10.1037/h0071487

Butler, N. B. (1894). Psychological literature: Educational. Psychological
     Review, 
1, 82-83. doi:10.1037/h0067178

March 13, 2014

Reference List or Bibliography: What’s the Difference?

Jeffby Jeff Hume-Pratuch

Did  you know that there’s no such thing as a bibliography in APA Style? It’s a fact! APA Style uses text citations and a reference list, rather than footnotes and a bibliography, to document sources.

A reference list and a bibliography look a lot alike: They’re both composed of entries arranged alphabetically by author, for example, and they include the same basic information. The difference lies not so much in how they look as in what they contain.

QuestionA bibliography usually contains all the works cited in a paper, but it may also include other works that the author consulted, even if they are not mentioned in the text. Some bibliographies contain only the sources that the author feels are most significant or useful to readers.

In APA Style, however, each reference cited in text must appear in the reference list, and each entry in the reference list must be cited in text. If you cite only three sources in your paper, your reference list will be very short—even if you had to read 50 sources to find those three gems! (Hopefully, that hard work will pay off on your next assignment.)

The APA Style Experts are often asked to provide the “official APA-approved format” for annotated bibliographies (i.e., bibliographies that contain the author’s comments on each source). As you may have guessed, there isn’t one; APA Style doesn’t use bibliographies of any sort. In addition, though, the reference list in APA Style contains only the information that is necessary to help the reader uniquely identify and access each source. That’s why there is no format for an annotated bibliography in the Publication Manual.

January 30, 2014

How to Cite References Containing Lead Authors With the Same Surname and Publication Date

Tyler

 

 

by Tyler Krupa

In a previous post, I provided guidelines on how to properly cite different groups of authors with the same lead author and publication date. As shown in that post, when you have two or more references of more than three surnames with the same year and they shorten to the same form (e.g., both Smith, Jones, Young, Brown, & Stanley, 2001, and Smith, Jones, Ward, Lee, & Stanley, 2001, shorten to Smith et al., 2001), you need to clarify which one you are citing each time. To do this, on the second and all subsequent citations, you should cite the surnames of the first two authors and of as many of the next authors as necessary to distinguish the two references, followed by a comma and et al. (see the sixth edition of the Publication Manual, p. 175).

Smith, Jones, Young, et al., 2001

Smith, Jones, Ward, et al., 2001

Now let’s add a twist and use references that contain different lead authors with the same surname and year of publication. Do you know what you should do differently? Let’s find out by looking at the following references:

Jones, B. T., Corbin, W., & Fromme, K. (2001). A review of expectancy theory and alcohol consumption. Addiction, 96, 57–72. http://dx.doi.org/10.1046/j.1360-0443.2001.961575.x

Jones, S. E., Oeltmann, J., Wilson, T. W., Brener, N. D., & Hill, C. V. (2001). Binge drinking among undergraduate college students in the United States: Implications for other substance use. Journal of American College Health, 50, 33–38. http://dx.doi.org/10.1080/07448480109595709

On the second and all subsequent citations, are you tempted to add the names of the additional authors to distinguish the two references? Although this seems like a logical way to proceed, because the lead authors are not the same person, you should instead include the lead author’s initials in all the text citations (for more information about when to use author initials for text citations, see my recent post). Therefore, the text cites for these two references would be as follows:

Correct:

First citation: Previous studies (e.g., B. T. Jones, Corbin, & Fromme, 2001; S. E. Jones, Oeltmann, Wilson, Brener, & Hill, 2001) have shown that . . .

Subsequent citations: Both B. T. Jones et al. (2001) and S. E. Jones et al. (2001) produced similar results . . .

Incorrect:

First citation: Previous studies (e.g., Jones, Corbin, & Fromme, 2001; Jones, Oeltmann, Wilson, Brener, & Hill, 2001) have shown that . . .

Subsequent citations: Both Jones, Corbin, and Fromme (2001) and Jones, Oeltmann, et al. (2001) produced similar results . . .

or

Subsequent citations: Both B. T. Jones, Corbin, and Fromme (2001) and S. E. Jones, Oeltmann, et al. (2001) produced similar results . . .

In these citations, because the lead authors are different, the lead author’s initials should be included in all text citations, regardless of how often they appear. In addition, there is no need to add the names of the additional authors to distinguish the two references on the second and subsequent citations because the initials before the surnames of the lead authors already accomplish that.

Questions? Leave us a comment.

January 23, 2014

When to Use Author Initials for Text Citations

Tyler

 

 

by Tyler Krupa

You probably already know that references in APA Style are cited in text with an author–date system (e.g., Adams, 2012). But do you know how to proceed when a reference list includes publications by two or more different primary authors with the same surname? When this occurs, include the lead author’s initials in all text citations, even if the year of publication differs (see the sixth edition of the Publication Manual, p. 176). Including the initials helps the reader avoid confusion within the text and locate the entry in the reference list. For example, let’s look at the following two references and their corresponding text citations.

References

Campbell, A., Muncer, M., & Gorman, B. (1993). Sex and social representations of aggression: A communal-agentic analysis. Aggressive Behavior, 19, 125–135. http://dx.doi.org/10.1002/1098-2337(1993)19:2<125::AID-AB2480190205>3.0.CO;2-1

Campbell, W. K., Bush, C. P., & Brunell, A. B. (2005). Understanding the social costs of narcissism: The case of the tragedy of the commons. Personality and Social Psychology Bulletin, 31, 1358–1368. http://dx.doi.org/10.1177/0146167205274855

Text Citations

First citation: Many studies (A. Campbell, Muncer, & Gorman, 1993; W. K. Campbell, Bush, & Brunell, 2005) have shown . . . .

Subsequent citations: Both A. Campbell et al. (1993) and W. K. Campbell et al. (2005) provided participants with . . . .

As you can see from the examples above, even though the year of publication differs in the two Campbell references, the lead author’s initials should be included in all text citations, regardless of how often they appear.

Although this rule seems straightforward, one thing that trips up some writers is how to proceed when different lead authors with the same surname are also listed in other references in which they are not the lead author. To help illustrate what should you do, let’s look at the earlier Campbell examples again, but now let’s add some additional references.

References

Brown, Y., & Campbell, W. K. (2004).

Campbell, A., Muncer, M., & Gorman, B. (1993).

Campbell, W. K., Bush, C. P., & Brunell, A. B. (2005).

Smith, L. N., Campbell, A., & Adams, K. (1992).

Although you may be tempted to include the initials every time the surname Campbell appears in the text citations, note that per APA Style, the initials should be included only when Campbell is the lead author. Therefore, initials should be used for only two of the above four references in the text citations.

Text Citations

First citation: Many studies (Brown & Campbell, 2004; A. Campbell, Muncer, & Gorman, 1993; W. K. Campbell, Bush, & Brunell, 2005; Smith, Campbell, & Adams, 1992) have shown that . . .

Subsequent citations: . . . as was done in previous studies (Brown & Campbell, 2004; A. Campbell et al., 1993; W. K. Campbell et al., 2005; Smith et al., 1992).

Another related item to note is that if the reference list includes different lead authors who share the same surname and first initial, you should provide the authors’ full first names in brackets (see the Publication Manual, p. 184).

References

Janet, P. [Paul]. (1876).

Janet, P. [Pierre]. (1906).

Text Citations

(Paul Janet, 1876; Pierre Janet, 1906)

We hope these examples clear up any points of possible uncertainty. Still have questions? Leave us a comment.

November 14, 2013

How to Cite Part of a Work

Chelsea blog 2
by Chelsea Lee

This post will explain how to cite just part of a work—such as a footnote, table, figure, chapter in an authored book, paragraph, section, or page—in an APA Style paper. It’s actually quite simple: Just provide a citation for the whole work in the reference list, and in the text, include the regular author–date citation plus information about the specific part to which you want to bring the reader’s attention.

Puzzle pieces

The idea is to provide a path to the source. The in-text citation refers the reader to the reference list entry, which in turn provides enough information for the reader to find the source itself. The extra information in the in-text citation further specifies which part of the reference the reader should attend to.  If you need to cite a part within a part (such as a row within a table), just add that information into the text citation (e.g., Smith, 2013, Table 1, column 4).

Note that if you want to cite a chapter in an edited book, a separate format applies. Chapters in edited books, unlike those in authored books, receive their own reference list entries because different authors write different chapters in the book, and it is important to properly attribute the citation in the paper. Chapters in authored books, on the other hand, can be cited in the text, but the reference list entry should be to the whole book because that is what the reader would look up in a library catalog or database.

Example In-Text Citations to Parts of Sources

Here are a few examples showing how to cite part of a work in the text:

  • (Woo & Leon, 2013, Figure 3)
  • Caswell, Morgan, and Duka (2013, Table 1, row 3)
  • (Park, Van Bavel, Vasey, & Thayer, 2013, footnote 3)
  • Dweck (2006, Chapter 3)
  • (Ebrahim, Steen, & Paradise, 2012, Appendix)
  • (Breska, Ben-Shakhar, & Gronau, 2012, Method section)
  • Cook et al. (2012, General Discussion section, para. 2)
  • (Ferguson, 2012, pp. 64–67)

In each case, the reference list entry would reflect the larger work containing the piece, formatted according to the document type.

For example, the reference entry for the citation to Figure 3 in Woo and Leon’s (2013) article, shown in the illustration, would follow the format for a journal article.

Woo, C. C., & Leon, M. (2013). Environmental enrichment as an effective treatment for autism: A randomized controlled trial. Behavioral Neuroscience, 127, 487–497. http://dx.doi.org/10.1037/a0033010

And the reference entry to Chapter 3 in the book by Dweck (2006) would follow the format for an authored book, and so on.

Dweck, C. S. (2007). Mindset: The new psychology of success. New York, NY: Ballantine Books.

Formatting Requirements

In looking at the examples above, you may have noticed that the names of some parts were capitalized or abbreviated. Capitalization and formatting rules are described in section 4.17 of the Publication Manual and a condensed version of that advice is provided in the table below.

Capitalized

Lowercase

Abbreviated in parentheses

Table

row

page (p.)

Figure

column

pages (pp.)

Chapter

footnote

paragraph (para.)

Official section names or headings (e.g., Method section)

Descriptive section names (e.g., introduction, when introduction is not an actual heading in the document)

 

 

Keep in mind these rules will apply to any part of a source you can think of. If the particular part you have in mind is not listed above or addressed in section 4.17, feel free to ask about it in the comments.

Search the APA Style Blog


ABOUT THE BLOG

My Photo


About Us

Blog Guidelines

APA Style FAQs

Archives


rss Follow us on Twitter

American Psychological Association APA Style Blog

Twitter Updates