Rationale
Why did the author publish this information?
Authority
What are the author’s credentials? Who are they?
Are they related to your research area?
Date
When was it published? Updated? Does it matter?
Accuracy
Was the information reviewed?
Is the information correct in comparison to other things you have read? If not, where do they diverge?
Relevance
Does it help to answer your research question?
Bias
What kinds of bias might the author(s) carry? How would this impact their writing?