Giving credit for others' ideas not only demonstrates that you have familiarized yourself with the scholarship in the field and earned the right to have a say, it allows other scholars to learn from your work by following the lead of your research.
APA
Web guide: APA Formatting and Style Guide from the Purdue Online Writing Lab
Print guide: Publication Manual of the American Psychological Association (on reserve at Burling and Kistle)
MLA
Web guide: MLA Formatting and Style Guide from the Purdue Online Writing Lab
Print guide: MLA Handbook for Writers of Research Papers (on reserve at Burling)
Chicago
Online version: Chicago Manual of Style 16th ed. (requires network login off campus).
Web guide: Chicago Manual of Style from the Purdue Online Writing Lab
Print guide: Chicago Manual of Style (on reserve at Burling and Kistle).
Turabian
Web guide: Turabian Citation Guide from the University of Chicago Press
Print guide: A Manual for Writers of Term papers, Theses, and Dissertations (on reserve at Burling)
American Chemical Society
Web guide: ACS Style Guide by the Williams College Libraries
Print guide: Handbook for authors of papers in American Chemical Society publications
American Sociological Association
Web guide: Formatting in Sociology (ASA) from the Purdue Online Writing Lab
Print guide: Style Guide (on reserve at Burling and Kistle)
American Anthropological Association
Web guide: AAA Style from the American Anthropological Association
Print guide: Chicago Manual of Style (on reserve at Burling and Kistle)
Online version: Chicago Manual of Style 16th ed. (requires network login off campus).