Evaluating sources is a critical part of doing research!
There are many different approaches to evaluating sources, both traditional print books/journals and websites. They generally use similar criteria. I prefer using the 5 Ws:
Based on Kathy Schrock’s 5 W's of Web Site Evaluation http://www.schrockguide.net/information-literacy.html
Tip: Is this information published by an organization or company? If there is no other author listed, consider the organization/company to be the author.