You may think of 'library sources' to be 'safe spaces' as far as credibility goes, but discuss with your students who these authors are, what their backgrounds are and why they write for academic publications - who is the audience for this research? How much does it cost to produce and access? Why do academics do research and what are their findings used for?
Questions to ask yourself about materials - many aspects of evaluation of information
Primary Sources - What are they and where do you find them? Includes a list of databases for finding primary sources.
Popular vs. Scholarly:
Guide
Video