Here are some questions to help you evaluate the information you find.
Adapted from http://research.pugetsound.edu/content.php?pid=656957&sid=5441626
By consulting book reviews of the scholarly works you are reading, you can gain a better understanding of the place of a particular work within the field. Here are some search tips for finding book reviews in selected databases.
Databases typically provide information that can help you evaluate if a source is relevant, current, and scholarly for your topic.
If you find a relevant source on your topic, look at the references to quickly locate additional reliable sources.
Example from Lavin, Irving. "Divine Grace and the Remedy of the Imperfect. Michelangelo's Signature on the St Peter's Pietà." Artibus Et Historiae 34, no. 68 (December 2013): 277-328.
Google Scholar can help you find articles which have cited an article that you have found. Frequent citation is often (but not always!) a marker for a particularly influential scholarly work.
Step 1: When looking at search results, check for the 'Cited by X' link underneath each result. That will tell you how many subsequent articles (that Google Scholar is aware of) have cited this particular article or book.
Step 2: Click that link, and you will be taken to a new set of results, all of which have cited the original article, which will still be listed at the top of the page.
Look at the item details to help you evaluate the source:
Book Example from Primo: