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.
Answer:
characteristics that define a constitution as a "higher law" are:
1. Basic right of life,liberty and property
2.Establishes the responsibility to protect the government to protect these right
3.Place limite on how people use their power like
citizen right,how resources are distribute.