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Why are there different citation styles? Why does it matter?
MLA
The Modern Language Association (MLA) provides a method for source documentation that is used in most humanities courses. The humanities place emphasis on authorship, so most MLA citation involves recording the author’s name in the physical text. The author’s name is also the first to appear in the “Works Cited” page at the end of an essay. The most recent MLA formatting can be found in the seventh edition of the MLA manual.
APA
The American Psychological Association (APA) provides a method for source documentation that is used in most social sciences courses. The social sciences place emphasis on the date a work was created, so most APA citation involves recording the date of a particular work in the physical text. The date is usually placed immediately after the author’s name in the “References” page at the end of an essay. The most recent APA formatting can be found in the sixth edition of the APA manual.
General Book Citation
MLA
Pollan, Michael. The Omnivore’s Dilemma. New York: Penguin Group, 2006. Print.
APA
Pollan, M. (2006). The omnivore’s dilemma. New York, NY: Penguin Group.
Source: https://owl.english.purdue.edu/owl/resource/949/01/