Answered By: Mary Kaye Hooker Last Updated: Mar 26, 2018 Views: 131
I would direct you to the Research Basics guides. Look at the Resource Types. This page explains the different levels of evidence, and also has a table that differentiates the different types of journals and articles.
Attached below is a more expanded table than the one on the Resource Types page that breaks out the types of journals and provides more explanation.