Assessing the credibility of information found on the internet requires knowing who is responsible for the content of the site, what kind of a reputation that person or organization has, and tracking the sources referenced in the site. When possible researchers should start with trusted resources, rely on primary sources, and verify everything with a second resource.
Graham, Suzanne R., "Do You Trust Me? : Assessing Credibility on the Web" (2008). Presentations. 40.