When you Google for sources, be sure you understand where they come from!
Many of the articles you find by searching BULS, Google Scholar, and the article databases, e.g., MLA Bibliography, are peer-reviewed. Some articles are designated as "peer-reviewed" but they are actually "scholarly/academic." What is the difference?
Peer-reviewed (sometimes called "Refereed"). Before articles are accepted for publication, they are closely read and critiqued by several scholars who study and do research in the same or a similar subject area.
Scholarly/academic. These articles might be written by researchers but are accepted for publication by the journal's editor (or editorial staff) without peer review. (Some databases use this designation for peer-reviewed.)