If there is a citation within the sentence/phrase you are citing, use single quotes around the part that was citied in your source.
I used to think that “going to the store was cool, but Elizabeth said ‘it is not cool’” (Smith 4).
If your quote is more than 4 lines, make it a block quote.
Indent the entire quote 10 spaces (2 tabs) .
No quotation marks around a block quote.
Period goes before parenthetical citation.
Smith notes that
Although the public grew to accept film as a teaching tool, it was not always aware of all it was being taught. That was because a second type of film was also being produced during these years. (Smith 21)