I justed asked this same question, and I was told by my teacher that you would cite the source in parentheses right afterwards. For example, if you wanted to cite a famous quote from a book... *example below*
"I'm on a roller coaster that only goes up, my friend." (Chater 1, page 67)
^^ That would be how you would cite a famous quote from a book. The same thing happens when you want to cite a phrase from an article, or a movie. Depending on what you are citing from, the way you write the citation varies. I hope this helps! :) Let me know if you need anything else! I'd be more than happy to help you out! :)