Here are some other helpful tools for evaluating the quality of Web or print sources.
Evaluating What Your Find on Websites
The following guidelines are important to consider when evaluating websites (they help with articles and books, too!):
(These criteria based on checklist in the book Web Wisdom: How to Evaluate and Create Information Quality on the Web by Jan Alexander and Marsha Ann Tate)
Discover the difference between articles from scholarly journals and popular magazines/newspapers and find out why articles from scholarly journals are considered more authoritative.
(Courtesy of the Peabody Library at Vanderbilt University)
Recognizing a few top-level Web domains can hlp you evaluate the source:
You can even restrict your Internet search to a particular domain using Google Advanced Search!