A credible peer-review source is from a source that isn't biased, or is not related to you. It is best to find someone who isn't one of your friends. Since they are credible, the source should be verified that they know what they are talking about as well. I hope this makes sense.
A bias in a news story can make the information less credible because it's someone's opinion. It can affect the news story because the emphasis would be changed by the caster's opinion on the story.
Okay who is the narrator or his thoughts and feelings
