This document discusses how to evaluate the reliability of web sites and databases as research resources. It provides tips for assessing the credibility, accuracy, reasonableness and support of a web site using the C.A.R.S. checklist. Databases are generally more reliable as they contain vetted resources from professional journals and provide citations, but require login credentials for off-campus access. The document advises finding author and publication details to evaluate a site, and that file extensions and domains do not guarantee credibility on their own.