AMA Manual of Style - Stacy L. Christiansen, Cheryl Iverson 2020
References Given in Text
Parenthetical citation in the text of references that meet the criteria for inclusion in a reference list should be restricted to circumstances in which reference lists would not be used, such as news articles. Note that in the text (1) the author(s) may not be named, (2) the title may not be given, (3) the name of the journal is abbreviated only when enclosed in parentheses, and (4) inclusive page numbers are given. Some resources, such as URLs, may be listed in the text when it is the website itself that is referred to rather than content on the site. The examples below are from news stories, which tend to not have formal end-of-article reference lists.
Davis et al recently reported that an apple a day does not keep the doctor away (JAMA Intern Med. 2015;175:777-783. doi:10.1001/jamainternmed.2014.5466).
The effect of eating an apple a day on number of physician visits was reported in a recent issue of JAMA Internal Medicine (2015;175:777-783. doi:10.1001/jamainternmed.2014.5466).
The JAMA Internal Medicine article (2015;175:777-783) on the effects of eating an apple a day received widespread publicity (eg, Time. March 30, 2015. http://time.com/3763878/apple-pharmacist-doctor-study/).
In July, a second case of E coli with the mcr-1 gene was reported by Castanheira et al in a human patient in New York (Antimicrob Agents Chemother. Published online July 11, 2016. doi:10.1128/AAC.01267-16).