Credible sources are ones the reader can trust. We trust that the author’s ideas are his or her own and can be backed up with evidence.
Writers should always use a credible source.
Scholarly sources are credible; but credible sources are not necessarily scholarly. For example: an article from USA Today newspaper or Time magazine is credible, but it is not scholarly.
Consider your specific informational needs.
ex. Do you need a scholarly journal article on a cultural group or are you looking for a review of the latest smartphone?
You can either HAVE A CCOW or give a CRAAP. Both offer criteria to consider when evaluating sources.
Remember: A source isn't always great or always bad. There is a lot of gray area. Are you able to defend to your instructor why you chose the source using CCOW or CRAAP criteria?