The Purdue Online Writing Lab (OWL)
CheckCite - check your citation style (Created by the James Madison University Libraries)
EasyBib - Web-based citation and bibliographic tool. Students can create citations in MLA, APA and Chicago styles, with additional research tools to enhance critical thinking skills.
Citation Guides - Provides examples of a variety of citation style guides including MLA, APA, ACS, AMA, CSE, Chicago, Turabian, and Harvard
Research and Documentation Online - by Diana Hacker. Covers MLA, APA, CMS and CSE styles.