Ask yourself these questions:
lWho wrote this? Is there contact information for the author?
lWhere does the document you found on the Internet live? Is it attached to a government agency, university, or library?
lIf the document contains research, does it include data and an explanation of the research methods(s) used to gather the data? Is there a bibliography attached to the document?
lIs the information timely? Does the document include the date the information was gathered? Is there a “last updated” date or a copyright date?
l