55 posts categorized "In-text citations"

April 05, 2016

How to Cite a Blog Post in APA Style

Timothy McAdooby Timothy McAdoo

Dear APA Style Experts,

I’m a computer science major, and my favorite blog is called Gödel’s Lost Letter and P=NP, written by two esteemed computer science experts. Can I cite a post from that blog? I’m also writing a paper for my Introduction to Psychology class, and I want to cite the APA Books Blog. Can I?


Yes. You can create an APA Style reference to any retrievable source, though you should of course consider whether the source is reliable, primary, and timely.

Citing an Entire Blog

First, if you want to mention the blog as a whole, just include a mention of it in parentheses in your text, just as you would for mentioning an entire website.

Example Sentences

I really enjoy reading the new APA Books Blog (http://blog.apabooks.org).

I have learned a lot by reading the Psych Learning Curve blog (http://psychlearningcurve.org).

Note: In the first case, the word Blog is capitalized because Blog is part of the name (APA Books Blog). In the second example, blog is not part of the name (Psych Learning Curve). 

Blog-croppedCiting a Blog Post

However, if you are quoting or paraphrasing part of a blog post, you should create a reference to that specific post.

The elements of the reference are as follows:

"who": This is usually one or two people but can also be a company name or other type of group author. In the first example below, the post was credited to just “Freakonomics” (a screen name for the author or authors of the blog by the same name). If a byline is not evident, look at the beginning or end of the post for wording like “posted by.”

"when": Blog posts generally provide the year, month, and date. Include these within the parentheses in your reference. If the blog doesn’t give that level of detail, just include the year or year and month, if that’s all you can find. (Note that your in-text citation will include only the year; see the examples below).

"what": This it the title of the blog post followed by a notation of "[Blog post]." 

"where": Use “Retrieved from” and the URL of the blog post.

Example References

Freakonomics. (2010, October 29). E-ZPass is a life-saver (literally) [Blog post]. Retrieved from http://freakonomics.blogs.nytimes.com/2010/10/29/e-zpass-is-a-life-saver-literally/

Heasman, B., & Corti, K. (2015, August 18). How to build an echoborg: PhD researcher Kevin Corti featured on the BBC [Blog post]. Retrieved from http://blogs.lse.ac.uk/psychologylse/2015/08/18/how-to-build-an-echoborg-phd-researcher-kevin-corti-featured-on-the-bbc/

Mathis, T. (2015, August 12). What is human systems integration? [Blog post]. Retrieved from http://blog.apabooks.org/2015/08/12/what-is-human-systems-integration/

rjlipton. (2015). A fast graph isomorphism algorithm [Blog post]. Retrieved from https://rjlipton.wordpress.com/2015/11/11/a-fast-graph-isomorphism-algorithm/

The name of the blog itself is not part of the reference, although it's often evident from the URL.

In-Text Citations

As with other APA Style references, the in-text citations will match the author name(s) and the year.

Example In-Text Citations

... according to research on the health effects of the E-ZPass (Freakonomics, 2010).

Heasman and Corti (2015) wrote about an echoborg.

Mathis (2015) stated that...

Dr. Lipton noted two problems (rjlipton, 2015).

I hope you found these examples helpful! In my next post, I’ll discuss how to cite reader comments on a blog.

January 13, 2015

How to Cite Software in APA Style

Timothy McAdooby Timothy McAdoo

Can you cite computer software in APA Style? Yes! Here’s everything you need to know.

Q: Do I have to cite the computer software I mention in my paper?
A: The Publication Manual specifies that a reference is not necessary for “standard software.” What is “standard”? Examples are Microsoft Word, Java, and Adobe Photoshop. Even less ubiquitous software, like SPSS or SAS, does not need to be referenced.

Note: We don’t keep a comprehensive list of what programs are “standard.” You make the call.

In your text, if you mention a program, do include the version number of the software. For example, “We asked participants to type their responses in a Microsoft Word (Microsoft Office Professional Plus 2010, Version 14.0.7128.5000) file.”

However, you should provide a reference for specialized software. For example, let's say you used an open source software package to display items to the participants in your study. You should cite it. The reference format follows our usual who-when-what-where format.

  • Use an individual’s name in the reference if he or she has proprietary rights to the program. In all other cases, create a reference as you would for unauthored works.
  • After the title, in brackets, provide a descriptor for the item. This helps the reader immensely.
  • If the software is available online, provide the URL rather than the publisher name and location.

Example References

Esolang, A. N. (2014). Obscure Reference Generator [Computer software]. Washington, DC: E & K Press.
Customized Synergy [Computer software]. (2014). Retrieved from http://customizedsynergy.com

Example Text Citations

“We used the Obscure Reference Generator (Version 2.1; Esolang, 2014) and Version 1.0 of Customized Synergy (2014) to complete our work."

Q: Is the name of the program italicized?
A: No: not in the text and not in the reference.

Q: Is the name of the program capitalized?
A: Yes, the name of the software is a proper noun and should be capitalized, both in the text and in the reference list.

Q: What about programming languages?
A: You don’t need to include references for programming languages. But, feel free to discuss them in the text of your paper, if relevant.

Q: What about mobile apps?
A: Yes, you can cite those, too. If you need to cite an app, this blog post has everything you need to know.

Q: What about video games?
A: Yes, video games are software. Follow the templates above for the reference and in-text citation.

Q: What if I used an online application to have my participants complete a survey?
A: Like Survey Monkey? If you mention the use of a site, simply provide the URL in your text (e.g., “Participants were given a link to an online survey, which the authors created using Survey Monkey (http://www.surveymonkey.com).” However, if you’re citing a particular page from the cite (e.g., a help document or the “About” page), you should reference that page just as you would any other. See this eggcellent post for more details about citing websites.

Q: What if I wrote the software myself?

A: If the reader can retrieve it, you can include a reference, following the template above. If you’ve created and published/posted software, that certainly falls into the “specialized” area noted above.

But, if you’ve written software that is not retrievable, a reference is not possible.  If, for example, you’ve included the full code as an appendix, you will want to mention that appendix in the text, but a reference is not needed. You might also find these post about how to write about yourself and whether and how to cite one’s own experiences helpful.

I've tried to cover everything, but please let me know what I missed. I look forward to questions and comments!

July 10, 2014

Does APA Style Use Ibid.?

David Becker

By David Becker

Dear APA Style Experts,

Ibid Question

When should I use ibid. in my research paper? I want to cite the same source multiple times in a row, but I’m not sure how. Please help!

—Brann D.

Dear Brann,

Ibid. is one of several topics not covered in the Publication Manual because it isn’t used in APA Style. Other styles that document sources with footnotes or endnotes use ibid. to point to a source that was cited in a preceding note. APA Style, however, consistently uses the author–date format to identify an idea’s origin.

When repeatedly referring to the same source, it’s not always necessary to include a parenthetical citation at the end of every paraphrased sentence, as long as the narrative plainly indicates where the information is coming from. Even a direct quotation may not require a full parenthetical citation in this case—you can vary your citation style. If you’re not sure whether your paper clearly shows that you’re drawing multiple thoughts from one source, just ask your instructor, a classmate, or someone at your school’s writing center to give it a quick read. One of the most valuable resources in any form of writing is a second pair of eyes!

I hope this post answered your question, Brann! You can also turn to pages 174–175 of the Publication Manual for examples that show how to integrate citations into the narrative and when to include the publication date. Also be sure to check out one of our earlier posts that briefly reviews how to create in-text citations. And, as always, feel free to comment on this post, leave us a note on Twitter or Facebook, or contact us directly about any questions you may have.

May 09, 2014

Comparing MLA and APA: Citing Resources


By David Becker

Last week, we touched on the general differences between MLA and APA styles. Today, I talk about what is probably the biggest difference between the two styles: how to cite resources. These divergent rules can make transitioning from one style to the other a frustrating process, particularly for students. A few style errors can mean the difference between an A and a B on a paper. As an English major who only used MLA Style in school, learned APA Style for my job, and then relearned MLA Style for a few online courses, I can personally attest to the difficulty of mentally juggling two sets of style rules.

Style Frustration

Despite their differences, the APA and MLA citation systems have the same overall function in a research paper—sources are acknowledged via in-text citations, each of which corresponds to an entry in an alphabetical list of works at the end of the paper, referred to as “Works Cited” in MLA Style and “References” in APA Style. However, the MLA Handbook also mentions some variations, such as a “Works Consulted” list, which contains sources not cited within the body of the paper, and an annotated bibliography, which includes a brief description or evaluation of each source. APA Style does not use these alternate methods (see our posts about reference lists vs. bibliographies and some topics the Publication Manual doesn’t cover).

The differences between the two styles become even more apparent when one is creating text citations. MLA Style includes the author’s last name and the page number, whether citing a direct quotation or not. However, APA Style text citations also include the publication date, because the timeliness of research is important in science writing, and the page number is required only for direct quotations. Below are some hypothetical examples of parenthetical citations in both styles:


(Adams 42)
(Lennon and McCartney 999)
(Hexum, Martinez, and Sexton 123)


(Adams, 1979) or (Adams, 1979, p. 42)
(Lennon & McCartney, 1968) or (Lennon & McCartney, 1968, p. 999)
(Hexum, Martinez, & Sexton, 1994) or (Hexum, Martinez, & Sexton, 1994, p. 123)

These citations lead readers to the reference list, which is where the differences between the two styles are most apparent, a topic I cover in my next post. In the meantime, I hope this overview has been helpful to those of you transitioning from MLA Style to APA Style. If you’re new to APA Style, the Publication Manual and this blog are your go-to resources. I also recommend that you try our free tutorial on the basics of APA Style and visit our FAQ page, as well as our pages that provide quick answers for citing sources and formatting your research paper. If you can’t find what you’re looking for after checking those resources, feel free to contact APA Style directly via e-mail or find us on Facebook and Twitter.

March 20, 2014

Rising Citation Trick

Daisiesby Stefanie

Let’s say you are writing a paper, and you have a great point to make that stems from a number of sources, all needing in-text citation. Let’s say one of those sources is head and shoulders above the rest, though, in inspiring your thought and supporting what you have said. You look at the source, and the lead author’s surname begins with Z. Your heart sinks. According to APA Style, citations are listed alphabetically. Is this terrific source doomed to remain at the tail end of a long list of citations, or is there some way you can bump this source to the front of the line?

Good news! Like a magician, you can direct your audience’s attention where you would like it go to. You just need a few extra words (not abracadabra, but close) and voila! The deed is done!

This, like all great magic tricks, is best illustrated by example. Blog magician

Sleight of hand is not for the faint of heart and can, in fact, be counterintuitive: When you think you are seeing something being manipulated in front of you, you may well not be at all (Zarrow, 2001; see also Copperfield, 2008; Jay, 2013; Penn & Teller, 2012; Stone, 2012; Thurston, 1930).

Here, I wanted to make sure Herb Zarrow, inventor of the Zarrow Shuffle, got his due, so I put his source as the first citation. The rest of the citations are included, but they appear after the words see also. Some other words and phrases that could be used, depending on the situation, are for more information; for a review, see; or a specific phrase that fits your particular situation (e.g., for other counterintuitive sleight-of-hand tricks, see). 
Another separating term is cf., but proceed carefully. When cf., the Latin abbreviation for compare, is used, the citations that follow may be assumed to contradict or otherwise differ from the point being made. Think of it as being short for “see, by way of comparison.”

Even physical magic is about appearances: Although we in the audience worry about the assistant in the box, we do not really think that she is going to end up sawed in half (Thurston, 1925; cf. Blaine, 1999, 2000, 2002; Houdini, 1901, 1912a, 1912b).

If you have another turn of phrase that you like to use in these situations, please share it in the comments!

Photo: SurkovDimitri/iStock/Thinkstock. 

February 20, 2014

How to Cite a Psychological Test in APA Style

Timothy McAdoo
by Timothy McAdoo

A reference to a psychological test (also called a measure, scale, survey, quiz, or instrument) follows the usual who-when-what-where format.


Here’s an example of a test you might have retrieved directly from a website:

Purring, A. (2012). Charisma and Tenacity Survey [Measurement instrument].
     Retrieved from http://www.apa.org/tests/measures/instruments/surveys

A test's name is a proper noun, so be sure to capitalize it in the reference.

In other cases, you may actually be citing the database record rather than the test. If you found a record for the test in a database, you can cite it, whether or not the record contains a link to the test itself:

Barks, H., & Howls, I. (2013). Directions of Generosity [Database record].
     Retrieved from The McAdoo Database of Fictional Titles. http://dx.doi.org

how to cite psychological tests in APA Style: http://blog.apastyle.org/apastyle/2014/02/how-to-cite-a-psychological-test-in-apa-style.htmlOr, perhaps you’ve used a test that is not available online. Not to worry, the format varies only in the "where" element. Use the first example above as your template, but replace “Retrieved from http://...” with the location and publisher (e.g., Petland, MD: E & K Press).

Using Acronyms

Although some tests are better known by their acronyms than by their full titles, the acronym is not included in the reference.* Rather, introduce the acronym at the first use in the body of the paper, as shown in the examples below.

In-Text Citations

In the body of your paper, be careful to write the name exactly as it appears in your reference. And here again, capitalize the test name, because it is a proper noun. However, capitalize the word survey (or instrument, quiz, etc.) only if it’s part of the test’s name:

“In this study, we used Purring’s (2012) Charisma and Tenacity Survey (CATS) rather than Barks and Howls’s (2013) Directions of Generosity survey.”

The abbreviation need not be introduced if the test name is mentioned only once. However, if the test name appears frequently in the paper (i.e., generally three or more times), define it the first time, and use the abbreviation consistently thereafter. Note also that the test names are not italicized when used in the text. 

Finally, although you don’t need to include the author and date every time you mention the test by name, do include the author–date citation if you quote directly from the test or paraphrase it in any way.

If you’ve read this far, you’ve passed my test! Give yourself an A+.


*The exception is the rare case where the acronym is the only official name of the test (i.e., an official spelled-out title no longer exists, which is an uncommon occurrence; the most famous example is the SAT, which no longer has a spelled-out name).

February 13, 2014

Footnotes for Source Citations in APA Style?

Jeffby Jeff Hume-Pratuch

Dear Style Experts,

I am writing a paper in APA Style. I have the sixth edition of the Publication Manual, but I’ve been unable to find instructions for how to format my citations in footnote form. All I see in the manual is examples of references. Can you help me? 
                                                                               —J. D. Scotus, Paris, TX

Dear J. D.,

There are a number of very good style manuals that use the footnote–bibliography method of citation, but the APA Publication Manual is not among them. APA Style uses text citations, not footnotes or endnotes, to direct the reader to a source in the reference list. This differs from other source documentation styles that use a combination of footnotes or endnotes and a bibliography for that purpose.

The only use for footnotes in APA Style is to provide additional content that supplements the text (e.g., to briefly acknowledge a tangential idea that is nevertheless important to the discussion or to note copyright permission for reprinting a lengthy quote). Endnotes are never used in APA Style, but you’ll find more about content footnotes in section 2.12 of the APA Publication Manual.

Dear Style Experts,

Author–date citations don’t give the reader enough information—I really prefer to give the source up front. What if I formatted the footnotes exactly like APA Style references, but put them at the bottom of the page? That would still be in APA Style, right? 
                                                                                         —J. D.

Dear J. D.,

The use of author–date text citations, rather than footnotes, is part of the essence of APA Style. It’s not optional.

Blueberry_heart_pancakesSuppose you asked me to make your favorite blueberry pancakes for Valentine’s Day. The store was out of blueberries, due to the latest snowpocalypse, so I used bananas; and the cat had gotten into the skillet, so I had to bake the batter in a muffin tin. The result might be delicious, but it wouldn’t be blueberry pancakes, would it? (Not even if we put maple syrup on them.)

Don’t put syrup on your muffins, and don’t use footnote citations in APA Style.

February 07, 2014

How to Cite an Annual Report in APA Style

Timothy McAdooby Timothy McAdoo

Annual reports are usually easy to find on a company's website. The APA Style Guide to Electronic References says to "format references to technical and research reports and other gray literature as you would a book retrieved online." Thus, a reference to an annual report follows the usual who-when-what-where format.

For example,

American Psychological Association. (2013). 2012 annual report of the American
    Psychological Association. Retrieved from http://www.apa.org/pubs

If you used a print version of the report, replace the URL with the location and name of the publisher, like a reference to a book. And, note that when the author is the publisher, the word Author is used.

For example,

National Association of Social Workers. (2012). 2011–2012 annual report.
    Washington, DC: Author.

In both cases, the in-text citation follows the author–date format (e.g., American Psychological Association, 2013; National Association of Social Workers, 2012).

January 30, 2014

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




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:


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 . . .


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 . . .


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




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.


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.


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).


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.

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