Questions From Users of the Manual

Q: I cannot find anything in the AMA Manual of Style about how to cite an article in a magazine. Please help.

A: You are correct that we do not address citations to magazines, primarily because the material we focus on is more scholarly. However, you could extrapolate from the information on how to cite a journal article (see section 3.11). Here is an example of citation of a magazine article:

Angell R. This old man: life in the nineties. New Yorker. February 17&24, 2014:60-65.

You’ll notice that although we prefer giving the year;volume number(issue number):inclusive pages in our citations to journal articles, some magazines do not use volume and issue numbers but instead rely on the issue date. This seems to be true of the New Yorker, and this article was in a double issue, so you’ll see that I have suggested using issue date:inclusive page numbers.

Q: What is the best way to send a question to you regarding the content of the style manual?

A: You may write to the style manual at

Q: For package insert references, many times the manufacturer and marketing company are the same. However, if they are not, which company should be listed in the reference citation?

A: It might be helpful in the case of a manufacturer and a marketer to list both. In this case, you could separate them by a semicolon:

Onglyza [package insert]. Princeton, NJ: Bristol-Myers Squibb Co; Wilmington, DE: AstraZeneca Pharmaceuticals LP; July 2009.—Cheryl Iverson, MA

Questions From Users of the Manual

Q: Do superscript reference numbers go before or after colons? What about periods and commas?

A: Superscript reference numbers go before colons and semicolons and after commas and periods. See section 3.6.

Q: When will the next edition of the AMA Manual of Style be published?

A: We have begun work on the next (11th) edition but do not yet have a projected publication date. I think 2016 is realistic. In the meantime, I hope you avail yourself of the online updates, which provide policy changes, etc. Those are free, if you do not have an online subscription. The monthly quizzes (which are free to subscribers) are also a good way (between editions) to see more examples.

Q: On PowerPoint slides, how do you recommend citing reference sources: on each slide that is not the presenter’s own, or at the end of the presentation?

A: At present, our style manual does not address style questions related to PowerPoint presentations; however, we are considering adding a few guidelines on this in the next edition. For now, I would suggest adding the reference sources on each slide, as a footer. Because the slides are likely to be pulled apart from the entire presentation and used by others, having the source with the content seems advisable.—Cheryl Iverson, MA

Questions From Users of the Manual

Q: I understand that the second printing of the AMA Manual of Style is now available and that many of the items in the list of Errata on the companion website ( are corrected therein. How can I tell if I have the first or the second printing? Does the second printing have a different ISBN?

A: Yes, the second printing was published in October 2007 and in it the majority of errata listed on the companion website are corrected. You can tell which printing you have by looking at the copyright page of the book (p iv). In the lower left corner of that page is a string of numbers, beginning, on the left, with 9. The number on the far right of that string will indicate the number of the printing. If the last number on the right is a 2, you have the second printing. The ISBN does not change with printings.

Q: Which is correct: “Qvar has similar systemic effects to those of fluticasone” or “Qvar has similar systemic effects as those of fluticasone”?

A: The correct idiomatic form is “similar…to” not “similar…as,” as with “identical…to” rather than “identical…as.” I suspect the use of “as” in this construction comes from a related idiom: “the same as.” You could also rephrase this to “Qvar and fluticasone have similar systemic effects.” or “Qvar has systemic effects similar to those of fluticasone.”

Q: Has the policy on SI units changed? If so, how?

A: Yes. These changes are addressed in detail in section 18.5.10. For laboratory values reported in JAMA Network Journals, factors for converting conventional units to SI units should be provided in the article. In text, the conversion factor should be given once, at first mention of the laboratory value, in parentheses following the conventional unit.

The blood glucose concentration of 126 mg/dL (to convert to millimoles per liter, multiply by 0.055) was used as a criterion for diagnosing diabetes.

For articles in which several laboratory values are reported in the text, the conversion factors may be provided in a paragraph at the end of the “Methods” section. In tables and figures, this information can be provided in the footnote or legend.

Q: Although the 10th edition recommends spelling out state names except in full addresses and the reference list (for location of publishers), I notice that you still show “DC” for District of Columbia. Is this an exception?

A: Yes.

Q: If a state’s full name is spelled out on first mention in running text, per the new style, what do you do when numerous cities in the same state are mentioned in an article? Should the state name be spelled out every time it is mentioned, every time a new city is mentioned, or should the 2-letter postal code be used after the first time the state name is spelled out in running text?

A: The answer will depend on the context. If the article is about cities in a particular state, you might not need to include the state name with the individual cities at all, as it will be clear what the state is, eg, “6 cities in Massachusetts.” If the state name is spelled out at the first mention of each new city, it shouldn’t need to be repeated, unless there are instances in the manuscript of a city that exists in more than 1 state (eg, Springfield, Massachusetts, and Springfield, Illinois).—Cheryl Iverson, MA