Answer
sorry I thought the question was easy
Explanation:
Universal experience is shown through the title by, having your own personal freedom and saying goodbye and how to surrender to the mystery of death.
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.