The Chicago Manual of Style
is used in most literature, arts, and humanities courses. These fields place emphasis on authorship. Because of this emphasis on the author of the work, most MLA citation involves recording the author’s name prominently in the in-text citation with no mention of the date. The author’s name is also the first to appear in the “Works Cited” page at the end of the essay.
is used most often in psychology, education, nursing, and other social sciences. These fields place emphasis on the date a work is created. Because of this emphasis on the date the work was created, the date will appear prominently in the citations. The in-text citation will include the date. The date is also placed immediately after the author's name in the each citation on the Reference page.
used most in history courses. History places much emphasis on primary sources, so footnotes and endnotes are used in the text to demonstrate where a particular piece of information derived from.