Examine your sources carefully and evaluate these aspects: 

• Authorship: is the author or editor qualified to publish in this field? Is the author’s education, experience, credentials, occupational title, or organizational affiliation, clearly stated? Can this information be verified? Is the material copyrighted? Can you contact the author to ask questions?
• Accuracy: are sources of facts and statistics given? Does document have grammatical or spelling errors or appear otherwise unedited? 
• Bias: what is the function of your source? to educate? to entertain? to broadcast personal opinions? to offer advice? to sell goods or services? Be sure you recognize it for what it is, and make sure you indicate its function in your paper.
• Scope: does your source material provide the whole picture, or a biased one (for example, leaving out important data to slant your understanding of issue)? Does this site contain information appropriate for college-level research?  
• Currency: does your source material have a copyright date or a recent “last updated” date? Are the facts & figures it publishes documented and dated? Or does it contain old, outdated information that should have been updated or removed?
• Format: is the web the most appropriate manner in which to deliver this information? Perhaps the contents were originally published in another format, and this is merely a summary, or it may be missing essential tables, graphs or charts.