A scholarly source is also known as a peer reviewed source. Peer reviewed is a term used to refer to journal articles and literary sources that have been reviewed by experts in the field before they are published. The following link has an explanation of scholarly sources and some examples.
https://libguides.csuchico.edu/scholarly
These journals can be found by following this link https://phsc.edu/academics/libraries and clicking on the "electronic resources" tab under the Library Resources heading. Depending on the subject that is being searched, many of the databases available have peer-reviewed or scholarly journals available. The quickest way to locate these types of articles is to do an advanced search and limit your search criteria to peer reviewed journals.