While evaluating the information you find in books and periodicals is important, evaluating web-based materials is absolutely crucial. Unlike books and journal and magazine articles, there is no editing process online, many websites that appear legitimate lack depth, authority, and accuracy. The following five evaluating criteria should be met before you include content from a website in your assignment. You must apply each criteria to a website to determine its worth. When deciding whether you should include a website as a resource for your paper, you must not only determine if a website is trustworthy and legitimate, but also if it is relevant to your topic and supports your thesis.
(These criteria based on checklist in the book The College Student's Research Companion by Arlene Quaratiello and Jane Devine)