The authors follow the pattern of Surname Initials (e.g. Brown JA) and are separated by a comma.
If there are six authors/editors or less, include the names of all authors/editors.
If there are more than six authors/editors, only list the first three names, then shorten with et al. (e.g. Smith AA, Jones BA, Bloggs JC, et al.).
In narrative citations in text, you mention the author's names as part of the sentence. Place the reference number next to the author's names.
When you have only two authors, you will always mention both authors in the sentence:
If you have three or more authors, give the first author and et al (note that for AMA you do not put a full stop after al in et al):
In certain instances, an article may not have an author. Start the reference with the title, in these cases. In other instances, the author may remain anonymous. However, the word “Anonymous” should not be used in a reference unless that word was published in the article’s byline. Note: There is no need to repeat the word “Anonymous” to represent a first name and a surname.
If a group or corporation is acting as the author of a work, and there are no individually listed authors, use the name of the group as your author.
In text, if you are referring to a corporation that has an official abbreviation, the first time you refer to them you must write the name in full, but then you can establish the acronym and refer to them using the shortened form from then on.
In the reference list, each entry should be considered independent of all other entries, as it is unlikely that anyone will read through the entire reference list in order. Therefore, do not use abbreviations for corporate authors, but write their name in full every time.