Purdue Online Writing Lab (OWL)
An excellent resource for multiple citation styles, including APA, Chicago, and MLA. This resource also offers guides to writing in specific subject areas such as writing in the sciences, writing in literature, and creative writing.
Citation Management Tools
Citation management tools allow you to easily keep track and organize the information you cite in your writing.
Noodle Tools offers integrated tools for note-taking, outlining, citation, document
archiving/annotation, and collaborative research and writing. Includes MLA and APA styles. Users must create an account.
EasyBib is a free citation tool that allows you to cite resources easily in MLA, Chicago, and APA styles.
Zotero is a free Mozilla Firefox plug-in that provides full citation manager functionality.
Mendeley is a freely available citation manager that has the power to help you manage your PDF collections.