The MLA Style Center: The MLA Style Center offers resources published by the Modern Language Association to help writers. This site includes a page with information about updates in the 8th edition of the MLA Handbook, as well as a quick guide to creating a Works Cited page and a guide for setting up a research paper.
APA Style Blog: APA Style Blog is published by the American Psychological Association and offers a number of resources for applying and using APA Style. The site has resources for everything from formatting to citations to writing style.
Chicago-Style Citation Quick Guide: The Chicago-Style Citation Quick Guide is published by the University of Chicago Press and is an official accompaniment to The Chicago Manual of Style. This quick guide offers writers sample citations for various types of sources, demonstrating both proper notes and proper bibliography entries for sources.
Purdue Online Writing Lab: The online writing center at Purdue University has an amazing library of 100 handouts on common writing problems.
American Political Science Association: This Political Science Style Guide is a great resource to ensure accuracy when preparing and submitting manuscripts. The APSA manual is the premier style manual for political science writing.
AMA Style: Purdue Owl's online resource for writing according to the American Medical Association's style guide. AMA is used for writing medical research papers, this resource can be used to assist with formatting references.