There are many different citation styles. The library provides online guides to the most common styles.
Which style should you cite your sources in? Ask your professor! Different professors prefer different styles.
If your professor doesn't have a preferred style, I recommend that you use LSA (Linguistic Society of America) style for your Linguistics projects.
The official style of the Linguistic Society of America is defined by the LSA's Unified Style Sheet:
Here are the citation examples from the Unified Style Sheet, arranged by the type of document being cited (such as books or articles):