Created by the Modern Language Association, MLA style is used for:

• Art

• English

• Literature

• Philosophy

Created by the American Psychological Association, APA style is used for:

• Anthropology

• Business (often uses Chicago style too)

• Education

• Library Science

• Psychology

Created by the University of Chicago Press, Chicago style (specifically, Notes-Bibliography System) is used for:

• Art

• History

• Literature

The Author-Date System of Chicago style is more often used for social sciences.