Research databases contain mainly scholarly journals. However, some databases may also contain newspapers, magazines, trade magazines, and other publications. Whether you're searching in the library catalog or in a research database from the library website, you'll often find a filter on the left or right sidebar to limit your results by publication type.
Most professional/scientific journals go through a rigorous editorial process called peer-review. Look at the video below for ways to identify whether your article has gone through that process.
Didn't find what you were looking for? Use Interlibrary Loan to login and submit a request access to a specific article, book chapter, or book.