Turabian, Kate L. A Manual for Writers of Term Papers, Theses, and Dissertations. 5th ed. Chicago: U Chicago P, 1987. (Uris and Olin Reference PE 1478 T92 1987) A newly revised and expanded version by B. Honigsblum, of Kate Turabian's standard guide for student writers. online version
MLA Style (MLA's web site)
Provides some FAQ's; however, this site does not provide the full style manual online.
MLA Handbook for Writers of Research Papers (6th ed.)
Olin and Uris Libraries Z253 .M68 2003 (located at the Reference Desks) APA Citation Style
research involves lots of sources and lots of pdfs, most people find using citation management/pdf organizing software saves time and energy.