It gets no easier, when it comes to citing, than MLA in-text citations. (Ask your professor whether I am joking about this.)
Most importantly, deploy that citation WHEN YOU USE THE INFORMATION. Like, right in the sentence, right in the paragraph, right there, yo.
If, for example, I were citing the article in the box to the right, I'd mention it right after making a reference to something I learned in it.
Specifically, and for example:
Some writers have noted that views of Louisiana have undergone rapid change over the past twenty years (Fernandez 2017).
Note that I don't need to include much. Author's last name, year of the publication I'm referring to, and a page number (for direct quotations) are all that are needed. this would be the same EVEN IF I were not paraphrasing, i.e., using a chunk of someone else's text (in "").
Article from a journal basic form:
Fernandez, Mark F. “Atlantic Identities: New Views of Louisiana in Global Perspective.” Early American Literature, vol. 52, no. 3, Sept. 2017, p. 709.
Note that you should indent after the first line; sorry for the bad formatting here.