Evaluate your journal sources
Choose scholarly/peer reviewed/refereed journals.
Evaluate your book sources
Look for Book Reviews (book reviews are published in journals):
JStor Advanced Search Type the title of the book in search box. Narrow by: Item type=Reviews.
Boston University Libraries Search Box Type the full title of a book, e.g., Arts & economics : analysis & cultural policy, The first result is the book itself. The following results are reviews of the book. Check for additional reviews using Material Type=Reviews.
Not every book will have been reviewed.
Evaluate your website sources
Evaluating Information Found on the Internet (Johns Hopkins)