Citation Style for Research Papers

Which should you use?
Ask each of your teachers which style they want you to use. If they have no preference, you can use any or follow these guidelines:

• APA: psychology, education, and other social sciences.
• MLA: literature, arts, and humanities.
• AMA: medicine, health, and biological sciences.
• Turabian: designed for college students to use with all subjects.
• Chicago: used with all subjects in the "real world" by books, magazines, newspapers, and other non-scholarly publications.

出處:
http://www.liunet.edu/cwis/cwp/library/workshop/citation.htm