Since you can't be knowledgeable about every subject, you may need to rely on the opinions of analysts and experts. These people have read many articles and books in their field and often have practical experience. Though you may not agree with their conclusions, using their experience will help you evaluate your sources.
To find reviews and criticism:
- Ask your instructors for their opinions about your choice of sources.
- Ask your librarian to help you identify the best periodical index or reference sources to find book reviews.
- To find reviews for Web sources, try using sites that rate pages - like Librarians' Index to the Internet and the Scout Report for some indication of their quality.