Generally the library evaluates the content of print and ebooks before ordering items and placing them in the collection. Some things to look for when assessing for scholarly content:
If you are searching for articles through the library's General Search, use the advanced search option and click scholarly peer reviewed under the limit search results box. The same applies when searching in individual databases. Having said that, it's still always a good idea to assess a journal article on its own merits.
Websites can be useful tools for accessing information. Keep in mind though that information on the Internet is not always current, accurate or authoritative. Ask questions like:
Keep in mind, just because you find something on the library shelves or though one of the library's databases does not mean it is a scholarly source.