The credentials of the author may give you clues to bias. The purpose of the author in presenting ideas, opinions, or research may in part determine the usefulness of the source. The date of publication may determine the value of a source. This should be clearly listed at the front of a book or periodical. Web pages may have this information, usually at the bottom of the page.
Conclusions Identify the source's conclusions.
You may not be able to evaluate this until you look at all your resources. If you still have questions after reading this guide, please ask the Reference Librarian for assistance. See COM Library's ground floor map to locate the Reference Office.