Evaluate Your Sources

If you are researching computer information, even a year old may be obsolete. If you are researching literature, resources that are 50 years old may still be valid. Frequently your instructor may restrict your resources to a given time period relative to the subject, such as no older then 5 years.

Date of publication should be clearly listed at the front of a book or periodical.

Web sites may have this information, usually at the bottom of the page.