Plagiarism
Detecting plagiarism, Florida State University: While this site is geared towards instructors and students at FSU, it does provide useful strategies and tools for detecting plagiarism and providing students with credible alternatives.
Detecting plagiarism online, Lisa Hinchliffe, University of Illinois Urban-Champaign:
Overview of definition, detection strategies, sites to purchase papers (or find freely posted ones), and references to find out more about plagiarism.