This is a link to a set of 9 tutorials. In order to see the table of contents, click on the lines in the upper right corner of the frame, and select the topic that will address your current needs.
Databases have become more sophisticated and make it easier to determine if a source is scholarly. In most databases, users can filter results by choosing "peer reviewed" or "scholarly articles," usually in the left column of the page. This can take much of the guesswork out of the process; nevertheless, it is still useful to know the differeces between scholarly and nonscholarly works. The chart below assumes a physical rather than digital item, but there are also categories that apply to both digital and physical.