what makes a source more trustworthy or credible than another?

Question

while doing research for a paper

Answer 1

1. The author is a first-hand source. He or she was actually part of the action or was there to witness it.

2. The source is written based on information taken from other credible sources.

Answer 2

Use factors that are nicely typical or no less than your factors would desire to come from those with stages and a solid expertise of the subject remember, like an authority interior the sphere.