The APA Style is often used in the Social Sciences (especially Psychology), Nursing, and Business, as well as Education.
APA uses parenthetical, in text citations.
Turabian Style is a simplified guide to Chicago Style. Chicago is often used in Religion, Anthropology, History, Business and a variety of other disciplines.
The Chicago style comes in 2 types: Notes (footnote or endnote) intext citation style, and Author-Date parenthetical style.
The MLA Style is use in Literature, Communication, and a number of other Arts & Humanities disciplines.
MLA citation style uses parenthetical intext citations.
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