In order to be able to evaluate a source, you need to think about how you are going to use that source in your research. A framework for looking at what your source is being used for is BEAM.
BEAM originally developed by Joseph Bizup.
Bizup, Joseph. "BEAM: A Rhetorical Vocabulary for Teaching Research-Based Writing." Rhetoric Review 27, no. 1 (2008): 72-86. doi:10.1080/07350190701738858