The citation style to use is determined by your professor, or if you are submitting a manuscript, by the journal or publisher.
However, each discipline tends to use one, two, or more styles.
Anthropology - use Chicago (used to use AAA) Law & Legal Studies - use Bluebook,
Art History - use Chicago or Turabian Maroonbook or ALWD
Arts Management - use Chicago Linguistics - use APA, MLA or LSA
Biology - use CSE Mathematics - use AMS
Business - use APA, Chicago, or Harvard Medicine - use AMA or NLM
Chemistry - use ACS Music - use Turabian or Chicago
Communication - use MLA or APA Nursing- use APA
Computing Science - use Chicago Philosophy - use APA, MLA, Chicago
Criminology - use APA or Chicago Physics- use AIP
Education - use APA Political Science - use APSA
English/Literature - use MLA Psychology - use APA
History - use Chicago or Turabian Public Health-use APA
International Studies - use APA, APSA, Religion - use MLA or Chicago
Information found at the library for american.edu
Edited for relevancy to Bakersfield College.
APA (American Psychological Association) - used in the social & behavioral sciences (psychology, education, nursing, sociology)
Chicago Manual of Style - used in the humanites and social sciences
MLA (Modern Language Association) - used in literature and the humanities
Turabian Style - a variation of the Chicago style used in many disciplines in humanities, social sciences and natural sciences
Information found at the library for american.edu
Edited for relevancy to Bakersfield College.