128 posts categorized "References"

March 29, 2017

How to Create References When Words in the Title Are Italicized

Timothy McAdooby Timothy McAdoo

Although the title of a journal article or book chapter is not usually italicized, sometimes words within the title may be italicized. These include book or movie titles, letters or words as linguistic examples, statistics, scientific names for animals, and other items that would be italicized in text, per APA Style guidelines.


Corballis, M. C., & McLaren, R. (1984). Winding one's Ps and Qs: Mental rotation and mirror-image discrimination. Journal of Experimental Psychology: Human Perception and Performance, 10, 318–327. https://doi.org/10.1037/0096-1523.10.2.318
Foulkes, D. (1994). The interpretation of dreams and the scientific study of dreaming. Dreaming, 4, 82–85. https://doi.org/10.1037/h0094402
Lai, J., Fidler, F., & Cummings, G. (2015). Subjective p intervals: Researchers underestimate the variability of p values over replication. Methodology, 8, 51–62. https://doi.org/10.1027/1614-2241/a000037
Yoder, A. M., Widen, S. C., & Russell, J. A. (2016). The word disgust may refer to more than one emotion. Emotion, 16, 301–308. https://doi.org/10.1037/emo0000118

If the title of the work is already italicized, as with a reference for a book, report, or dissertation or thesis, then the item that would otherwise be italicized is reverse italicized (meaning that it is in roman type within an otherwise italicized title).


Blaylock, B. (2015). Coming of age: The narrative of adolescence in David Almond’s Kit’s wilderness and Nick Lake’s In darkness (Master’s thesis). Retrieved from ProQuest Dissertations and Theses database. (UMI No. 10000726)
Reichenberg, L. (2013). DSM–5 essentials: The savvy clinician’s guide to the changes in criteria. Hoboken, NJ: Wiley.


February 15, 2017

How to Format Scientific Names of Animals

Timothy McAdooby Timothy McAdoo

When an animal name is part of a journal article title, it is conventional to provide the animal’s scientific name (genus and species). Genus is always capitalized and species is not. Notice that the scientific names are also italicized (see examples on p. 105 of the APA Publication Manual).

For example, see the following articles from APA Journals:

Journal of Comparative Psychology article: Dogs (Canis familiaris) Account for Body Orientation but Not Visual Barriers When Responding to Pointing Gestures Journal of Experimental Psychology: Animal Learning and Cognition: Control of Working Memory in Rhesus Monkeys (Macaca mulatta)

This convention of including the scientific name in the paper’s title is not an APA Style guideline specified in the manual; however, it is an accepted norm of scientific research. (If you have any questions about whether to include the scientific name in your paper or manuscript, ask your teacher, advisor, or editor.)

So, if you cite an article that includes a genus and species in the title, how should the title appear in your reference list? Keep the italics and capitalization of the animal’s scientific name exactly as they appear in the original title:

MacLean, E. L., Krupenye, C., & Hare, B. (2014). Dogs (Canis familiaris) account for body orientation but not visual barriers when responding to pointing gestures. Journal of Comparative Psychology, 128, 285–297. http://dx.doi.org/10.1037/a0035742
Tu, H.-W., & Hampton, R. R. (2014). Control of working memory in rhesus monkeys (Macaca mulatta). Journal of Experimental Psychology: Animal Learning and Cognition, 40, 467–476. http://dx.doi.org/10.1037/xan0000030

February 01, 2017

How to Cite the UpToDate Database in APA Style

Chelsea blog 2 by Chelsea Lee

The UpToDate database contains peer-reviewed medical articles that are periodically updated by experts in the field; as such, it is a popular source for writers to cite in APA Style.

Cite an article from UpToDate like you would an entry in an online reference work or chapter in an edited book. Here is an example citation:

Williams, J., & Nieuwsma, J. (2016). Screening for depression in adults. In J. A. Melin (Ed.), UpToDate. Retrieved February 1, 2017, from https://www.uptodate.com/contents/screening-for-depression-in-adults

  • In text: (Williams & Nieuwsma, 2016).

Here are some notes about the components of the reference:

  • Use the authors of the article as the authors in the reference.
  • For the year in the reference, use the year listed after “this topic last updated.”
  • For the title, use the title of the article.
  • Use the name of the deputy editor(s) for the article as the editor(s) of the reference work. Section editors do not need to be listed in the reference.
  • Write UpToDate in italics as the name of the reference work.
  • Provide a retrieval date because the content will change over time.
  • Provide a URL for retrieval of the article.

 Do you have additional questions about citing the UpToDate database? Leave a comment below.

Uptodate logo

January 26, 2017

How to Cite a Twitter Moment

Timothy McAdooby Timothy McAdoo

With Twitter moments, introduced last year, anyone can collect related tweets in one page.

These are easy to cite because Twitter provides all the necessary information—who (Twitter username), when (date), what (title), and where (URL)!




APA Style [APA_Style]. (2016, November 15). Research and writing [Twitter moment]. Retrieved from https://twitter.com/i/moments/801080248762847234

In-text citation: (APA Style, 2016) or APA Style (2016).


Reuters Top News [Reuters]. (2016, November 1). Inside David Bowie's art collection [Twitter moment]. Retrieved from https://twitter.com/i/moments/793575609028915200

In-text citation: (Reuters Top News, 2016) or Reuters Top News (2016).

If you need more help citing social media, see our posts about tweets, Facebook status updates, hashtags, and more!

January 04, 2017

How to Cite Quality Standards and Guidelines in APA Style

Chelsea blog 2
by Chelsea Lee

To cite a quality standard or guideline in APA Style, provide the author, date, title, and source of the work. After the title of the work, provide any number or identifier for the standard in parentheses without italics. Here is a template for citing a standard:


Reference list: Organization That Made the Standard. (year). Title of the standard (Standard No. 1234). Retrieved from http://xxxxx

In text: (Organization That Made the Standard, year).

The only exception is if the standard appears in the Code of Federal Regulations (CFR), because federal standards are considered legal references and follow legal style; directions for citing standards in the CFR are at the end of this post.

Here are some examples of typical standard citations and their corresponding in-text citations. Note that most of the organizations that publish standards commonly go by acronyms (e.g., OSHA for the Occupational Safety and Health Administration). The acronym is optional to use. If you do use the acronym, use it in the text only, not in the reference list entry. Spell out the name of the group the first time you cite the work and provide the acronym either in parentheses or brackets (depending on whether the written-out form is already in parentheses); for any subsequent citations or mentions, use the acronym. If you use multiple works by the same group, you only need to introduce the acronym once. How to introduce the acronym is also shown in the example citations below.

ISO Standards

International Organization for Standardization. (2016). Occupational health and safety management systems—Requirements with guidance for use (ISO/DIS Standard No. 45001). Retrieved from http://www.iso.org/iso/catalogue_detail?csnumber=63787

  • In text, first citation: (International Organization for Standardization [ISO], 2016) or International Organization for Standardization (ISO, 2016).
  • In text, subsequent citations: (ISO, 2016) or ISO (2016).

OSHA Standards

Occupational Safety and Health Administration. (1970). Occupational safety and health standards: Occupational health and environmental control (Standard No. 1910.95). Retrieved from https://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9735
  • In text, first citation: (Occupational Safety and Health Administration [OSHA], 1970) or Occupational Safety and Health Administration (OSHA, 1970).
  • In text, subsequent citations: (OSHA, 1970) or OSHA (1970).
  • Note that the date for an OSHA standard should be the effective date; for most standards, this is 1970. If you are citing multiple OSHA standards, create separate reference list entries for each one and differentiate them by using lowercase letters after the year (e.g., OSHA, 1970a, 1970b), as described in this post on “reference twins.”

NICE Guidelines

National Institute for Health and Care Excellence. (2013). Attention deficit hyperactivity disorder (NICE Quality Standard No. 39). Retrieved from https://www.nice.org.uk/guidance/qs39
  • In text, first citation: (National Institute for Health and Care Excellence [NICE], 2013) or National Institute for Health and Care Excellence (NICE, 2013).
  • In text, subsequent citations: (NICE, 2013) or NICE (2013).

Standard Published as a Federal Regulation

Designation of Uses for the Establishment of Water Quality Standards, 40 C.F.R. § 131.10 (2015).
  • In text: (Designation of Uses for the Establishment of Water Quality Standards, 2015) or Designation of Uses for the Establishment of Water Quality Standards (2015).
  • For more information on citing federal regulations, see Section A7.06 of the Publication Manual (p. 223).

The template shown at the beginning of this post should cover all types of quality standards you might want to cite in APA Style, but if you have further questions, leave a comment below!


December 19, 2016

How to Cite a YouTube Channel

Timothy McAdooby Timothy McAdoo

Dear APA Style Experts: I know you can create a reference to a YouTube video, but is it possible to cite an entire YouTube channel?

—Zeynep L.

Yes! A reference to a YouTube channel follows the usual who (YouTube username), when (date), what (title), and where (URL) format:


PsycINFO. (n.d.). Home [YouTube Channel]. Retrieved from http://youtube.com/PsycINFO

In-text citation:

PsycINFO (n.d.) or (PsycINFO, n.d.)

In this example,

Who = "PsycINFO.": Use the username shown in the "Who" section, as indicated in the image below.

When = "n.d." because YouTube channels are undated.

What = "Home [YouTube Channel]": As you can see below, every YouTube channel’s title is "Home" by default unless you are citing one of the other tabs (Videos, Playlists, Channels, Discussion, About) on the channel. If so, just substitute that tab’s name.

Where = "Retrieved from http://youtube.com/PsycINFO"

YouTube Channel graphic

November 30, 2016

Writing Website In-Text Citations and References

Dear Style Expert,

I found a very useful website and cited a lot of information from it in my paper. But how do I write an in-text citation for content I found on a website? Do I just put the URL in the sentence where I cite the information?




Dear Wallace,

This is a tricky question, but we can help! The short answer is that in most cases no, you do not put the URL in the text of the paper. In fact, the only time you would put a URL in the text would be to simply mention a website in passing. Because you’re citing specific information, you will need to write a regular APA Style author–date citation. Luckily, writing the in-text citation for a website or webpage is easy: Simply include the author and year of publication. The URL goes in the corresponding reference list entry (and yes, you can leave the links live).

Website Example 

In-text citation:

The American Nurses Association (2006) issued a position statement insisting that pharmaceutical companies immediately cease using thimerosal as a vaccine preservative.


Reference list:

American Nurses Association. (2006). Mercury in vaccines [Position statement]. Retrieved from http://nursingworld.org/MainMenuCategories/Policy-Advocacy/Positions-and-Resolutions/ANAPositionStatements/Archives/Mercury-in-Vaccines.html

Note that the title of the website or webpage should be italicized in the reference list if the work on the page stands alone but not italicized if it is part of a greater whole (if this is ambiguous on the source, just choose what you think makes the most sense for the situation). In deciding how to categorize material on a website for a reference, it may be helpful to consider whether what is on the website is similar to an existing category of document type—for example, this reference is a position statement, which is similar to a press release, white paper, or report; hence the italic title. To clarify the document type, you can also specify the format in brackets after the title. 

Determining Website Authors

It can be confusing to determine who the author of a website or webpage is. Often, the author is a group or agency rather than a particular individual. For example, the author of the position statement cited above is the American Nurses Association. If the website or webpage truly does not have an author, substitute the title of the page for the author in the in-text citation and reference list entry (see this post on missing reference pieces for examples of how to do this).

Determining Website Dates

A second source of confusion is that many websites or webpages do not include publication dates. If no date of publication is provided, use the letters n.d. (which stand for “no date”). The copyright date on the website itself should not be used as the publication date for particular content on that site.

If multiple dates are provided, use the most recent date on which the content was changed. For example, if the site says the content was first published in 2010 and last updated on August 6, 2016, then use the date 2016 in the in-text citation and reference list. However, if the site says it was first published in 2010 and last reviewed in July 2016, then use the date 2010 because a review does not imply that any information was changed.

Multiple Website Citations

If you use information from multiple pages on a website, create a separate reference list entry for each page, with in-text citations that correspond to the appropriate reference list entry. It is common for writers to have multiple entries with the same author and year, so to differentiate these entries, use a letter after the year (e.g., 2016a) or after n.d. (e.g., n.d.-a; more examples here), assigning the letter by putting the references in alphabetical order by title in the reference list. Put references with no date before references with dates, and put in-press references last.

Multiple reference list entries:

American Nurses Association. (n.d.). Know your disaster. Retrieved from http://nursingworld.org/MainMenuCategories/WorkplaceSafety/Healthy-Work-Environment/DPR/KnowYourDisaster  

American Nurses Association. (1991a). Equipment/safety procedures to prevent transmission of bloodborne diseases [Position statement]. Retrieved from http://nursingworld.org/MainMenuCategories/Policy-Advocacy/Positions-and-Resolutions/ANAPositionStatements/Position-Statements-Alphabetically/EquipmentSafety-Procedures-to-Prevent-Transmission-of-Bloodborne-Diseases.html

American Nurses Association. (1991b). Post-exposure programs in the event of occupational exposure to HIV/HBV [Position statement]. Retrieved from http://nursingworld.org/MainMenuCategories/Policy-Advocacy/Positions-and-Resolutions/ANAPositionStatements/Position-Statements-Alphabetically/Post-Exposure-Programs-in-the-Event-of-Occupational-Exposure-to-HIVHBV.html

American Nurses Association. (2015). Academic progression to meet the needs of the registered nurse, the health care consumer, and the U.S. health care system [Position statement]. Retrieved from http://nursingworld.org/MainMenuCategories/Policy-Advocacy/Positions-and-Resolutions/ANAPositionStatements/Position-Statements-Alphabetically/Academic-Progression-to-Meet-Needs-of-RN.html

In text, you can cite these references separately as usual (e.g., American Nurses Association, 1991b), or you can combine citations with the same author if desired. Simply state the author once and then provide the years of the applicable references in chronological order, separated by commas. 

Combined in-text citations:

American Nurses Association (n.d., 1991a, 1991b, 2015)

(American Nurses Association, n.d., 1991a, 1991b, 2015)

Do you have more questions about how to create in-text citations for content from websites or webpages? Leave a comment below.


—Chelsea Lee

September 21, 2016

How to Cite a YouTube Comment

David Becker

By David Becker

When researching a topic for your paper or manuscript, you may come across a few relevant YouTube videos—perhaps a TED Talk or two—that you would like to cite. Being the intrepid explorer of the Internet that you are, you may even brave those videos’ comment threads, desperately searching for some faint glint of rational discourse hidden within the dark, troll-infested depths. Or maybe you’re intentionally seeking out vile and offensive comments if you are writing about the psychology of Internet trolls. Whatever your reasons, you have found a YouTube comment that you would like to cite, but you don’t know how.

Some of the same principles for citing a blog comment also apply to citing a YouTube comment. For instance, list the commenter’s user name if their real name isn’t listed and add “Re:” followed by a space before the title of the video. Also, as with some blog comments, clicking on a YouTube comment’s time stamp will lead to a page with a unique URL that features that comment at the top of the comment thread. Include this unique URL in the “Retrieved from” portion of your reference.

YouTube Comments

There are, however, some important differences between citing blog comments and YouTube comments that are worth noting. Let’s first look at the publication date.

As with citing a blog comment, cite the date that the YouTube comment was posted, not the date that the video was uploaded. YouTube comments present a somewhat unique challenge in that they do not display precise publication dates. Rather, they indicate how long ago a comment was posted (e.g., “3 hours ago,” “2 weeks ago,” “10 months ago,” “4 years ago,” etc.). With such imprecision, there’s no sense in citing a day or a month, as you would do when citing a blog comment, so just cite the publication year.

The year that the comment was posted is easy to figure out using simple math. However, in the unlikely situation where there might be some ambiguity about what year a comment was posted, you can include “ca.” for circa after the publication date, much like when citing approximate dates for social media sources. This should be done as sparingly as possible.

Another difference between citing a YouTube comment and a blog comment is the formatting of the title. Whereas the title of a blog post is not italicized, the title of a video is italicized. However, the “Re:” is technically not part of the video title and therefore is not italicized.

Taking all this into consideration, here is a sample reference to a YouTube comment:

49metal. (2016). Re: Are you dating a psychopath? [Video file]. Retrieved from https://www.youtube.com/watch?v=cP5HIjA9hh4&lc=z13bu5ghznaawh0ez23ajz0gnquidx1z004

And here is a sample text citation for that comment:

Some do not see the value in these sorts of informal, self-diagnosis measures: “This invitation for lay people to diagnose a rare psychological disorder… is profoundly irresponsible” (49metal, 2016).

Keep in mind the reliability of your source within the context your paper’s topic when deciding what to cite. A random comment from an unidentified YouTube user, such as the one above, is likely not appropriate in a research paper that coalesces expert opinions on a scholarly topic. However, this type of informal source could be more appropriate in a different kind of paper, such as one about how people interact with each other on social media.

April 07, 2016

How to Cite a Blog Comment in APA Style

Timothy McAdooby Timothy McAdoo

We’ve covered how to cite an entire blog and how to cite a specific blog post. So, what about when you want to cite a comment on a blog?

The elements of the reference are as follows:

Blog-med"who": This is the name of the individual who made the comment, either real or a screen name, whichever is shown.

"when": This is the date of the comment (not the date of the blog post).

"what": Use "Re: " followed by the title of the blog post.

"where": Each comment usually has a unique URL. Unfortunately, blogs differ in how they present that URL, so you may have to hunt for it. Look for words like permalink or persistent link or just click the time stamp, which will often change the URL in your browser to the specific URL of that comment.

For example, click a time stamp in my first comment below and you’ll find that the URL in your browser becomes http://blog.apastyle.org/apastyle/2016/04/how-to-cite-a-blog-comment-in-apa-style.html#comment-6a01157041f4e3970b01b8d1ba04c1970c. It’s important to use the URL of the comment itself because sometimes the same person will leave multiple comments, and this takes the guesswork out of which one you meant.

If the comment does not have a unique URL, just use the URL of the blog post itself.

Using some of the same examples from the previous post, here’s how to cite comments on a blog:

Example References

David, L. (2010, October 29). Re: E-ZPass is a life-saver (literally) [Blog comment]. Retrieved from http://freakonomics.com/2010/10/29/e-zpass-is-a-life-saver-literally/#comment-109178

Mt2mt2. (2015, November 12). Re: A fast graph isomorphism algorithm [Blog comment]. Retrieved from https://rjlipton.wordpress.com/2015/11/11/a-fast-graph-isomorphism-algorithm/#comment-72615

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 Citation

... a "significant difference in the definitions" (Mt2mt2, 2015).


Leave a comment and you may find yourself included in this post! In a few weeks, I will update the examples above to include a reference to one comment below.

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.

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