Quick reference guides:
APA Style Guide for Business Students - A supplement to the regular APA Style Guide just for business majors
Chicago Style Guide - (Author, Title) [politics, anthropology]
Chicago Style Guide - (Notes, Bibliography) [art, history]
Electronic Citation Services:
Manual for Writers of Term Papers, Theses, and Dissertations. (Turabian) (Ref 808.02 T840b) Chicago: University of Chicago, 1996.
MLA Style Manual and Guide to Scholarly Publishing. (MLA) (Ref 808.042 G350a) 3rd ed. New York: MLA, 2008.
Citing medicine: the NLM style guide for authors, editors, and publishers [Web]. 2nd ed. c2007
Pocket Guide to Writing in History. (Ref 907.2 R148a) 8th ed. Boston: Bedford/St. Martin's, 2015.
Publication Manual of the American Psychological Association. (APA) (Ref 150.149 Am35b) Washington DC: APA, 2010.
Research and Documentation Online (5th edition) - Diana Hacker and Barbara Fister from Gustavus Adolphus College have an online style guide for APA, MLA, Chicago, and CSE. The instructions go over general paper preparation for each style, recommended databases for the field, and specific examples of how to cite.
St. Martin's Handbook. (Ref 808.02 L973) Boston: Bedford/St. Martin's, c2003.
Scientific Style and Format: The CSE Manual for Authors, Editors, and Publishers. (Ref 808.0665 C832) Reston, VA: Council of Science Editors in cooperation with the Rockefeller University, 2006
Borzoi Handbook for Writers. (Ref 808.02 C867a) 3rd ed. New York: McGraw-Hill, 1993.
Chicago/Turabian Documentation - From the University of Wisconsin, Madison.
Citation Machine - Type in the information, and this site will show you how to cite references in the APA and MLA formats.
Cite Sources - From the University of Texas.
Citing Sources - Easy to use menu, where you choose which citation you are looking for. It shows the major styles of citation: MLA, APA, Chicago, and Turabian. From Duke Libraries, Guide to Library Research.
Evaluate Web Pages - (Widener University / Wolfgram Memorial Library. See the PowerPoint Slide Presentation/Presentation Outline and Web evaluation checklists for excellent tips on evaluating Web sources.
Harbrace College Handbook. (Ref 808.042 H666) 12th ed. Forth Worth: Harcourt Brace Javanovich, 1994.
Little, Brown Compact Handbook. (Ref 808.042 Aa75) 7th ed. New York: Longman, 2009.
Sources - Great for both print and electronic sources. Choose what type of citation you are attempting to add to your source list, and it will give you an example of each style: MLA, APA, etc. Also looks at plagiarism, and why sources are cited. From Dartmouth.
St. Martin's Handbook. (Ref 808.02 L973) Boston: Bedford/St. Martin's, c2003. See also St. Martin's Handbook - Free registration to access online exercises for both MLA and APA citation, plus writing help, samples of bibliographies, and more.
Style/Citation Guides and Publications - Select Modern Language Association (MLA) Style Guide in Adobe Acrobat format. A general guide to using MLA style (William Paterson College, Sarah Byrd Askew Library).
Turabian Style Guide - Similar to Chicago above, here are examples of citations from Ohio State University. Includes 'scientific' and 'humanities' styles.
Citing Electronic Resources - (The Internet Public Library). A list of recommended citation guides for electronic resources.
Citing the Internet: A Brief Guide - from the National Network of Libraries of Medicine.
Electronic Reference Formats - APA Style - The official communication from the American Psychological Association on how to cite electronic communications.
Electronic Styles: A Handbook for Citing Electronic Information. (Ref 808.02 L612a) 2nd ed. Medford, NJ: Information Today, 1996.
MLA Style Manual - Authorized site from the Modern Language Association. Choose Style Manuals from the menu.
National Library of Medicine (NLM) - their Internet citation guide.
Style Sheets - For citing electronic resources include MLA, APA and CBE, Chicago and Turabian. From UC Berkeley's Teaching Library.
Complete Guide to Citing Government Information Resources: A Manual for Writers & Librarians. (Ref 808.02 G186a) Rev. ed. Bethesda, MD: Congressional Information Service, 1993.