General

• Citing Sources (Duke University Libraries)
  Documentation Guidelines for citing sources and avoiding plagiarism.

• The OWL at Purdue
  Guides from the Purdue OnLine Writing Lab (OWL).

• Research and Documentation Online (Diana Hacker)
  Describes four common citation styles: APA, Chicago, CSE, and MLA.

• List of Style Manuals

Digital Object Identifier (DOI)

• Resolve a DOI (http://dx.doi.org/)
• Free DOI look-up (CrossRef)
• Info for libraries: Information on DOIs from CrossRef
  A DOI is an alphanumeric name that identifies digital content, such as a book or journal article. The DOI is paired with the object's electronic address, or URL, in an updateable central directory, and is published in place of the URL in order to avoid broken links while allowing the content to move as needed.

APA (American Psychological Association)

Publication Manual of the American Psychological Association. 6th ed. (Ref BF76.7 .P83 2010) (Used in psychology and many social sciences.)

• APA Citation Style (UD Library)

• APA Style.org (APA)
  The American Psychological Association's official website for APA Style.

• APA Formatting and Style Guide (Purdue OWL)

• APA Style Essentials (By Douglas Degelman, Vanguard University)
  More than a guide to citations and Reference lists, this guide describes how to write the various parts of a paper following APA instructions.

• Researching in the Social Sciences (APA) (Diana Hacker)

Chicago Manual of Style

The Chicago Manual of Style. 15th ed. (Ref Z253 .C57 15th) (Used in history, many humanities, and many social sciences.)

• Chicago Manual of Style Online 16th ed. now available [restricted to UD]

• Chicago-Style Citation Quick Guide (Chicago Manual of Style wWebsite)

• Researching in History (Chicago) (Diana Hacker)

Government Information

• How to Cite - U.S. Government Information

Legal

• Introduction to Basic Legal Citation (LII). 2007.

MLA (Modern Language Association)

MLA Handbook for Writers of Research Papers. 7th ed., 2009. (Ref LB2369 .G53 2009). (Used in English and the humanities.)

• MLA Citation Style (UD Library)

• MLA Formatting and Style Guide (Purdue OnLine Writing Lab (OWL))

• MLA Style (Modern Language Association)
  

• Researching in the Humanities (MLA) (Diana Hacker)

RefWorks

• RefWorks
  is a Web-based reference and citation manager. After you create an individual account, RefWorks helps you store and manage bibliographic information and generate notes and reference lists in various bibliographic citation formats. RefWorks is listed on the Library Databases pages.
  

• RefWorks @ the University of Delaware Library – a Quick Guide (UD Library)

Turabian

A Manual for Writers of Research Papers, Theses, and Dissertations: Chicago Style for Students and Researchers. 7th ed. (Ref LB2369 .T8 2007)

• Turabian Citation Style (UD Library)
  Guide to the Notes and Bibliography Style (Humanities style).

• Turabian Quick Guide (University of Chicago Press)

• Citing Sources Using the Chicago/Turabian Style: Notes System (University of Maryland Libraries)

UD Code of Conduct

• Academic Honesty