When quoting movie dialogue within the text, the citation must directly follow the quote. Although writers are involved in the creation of a movie, usually there isn't a specific author. Instead, the in-text citation should name the producer. End the dialogue like this: (Producer's last name, Year).
Since there is no author, you should list the source alphabetically by the producer's last name. The entire citation should look like this:
Last name, First initial. (Producer), & Last name, First initial. (Director). (year). Movie title [Motion picture]. Country of Origin: Name of Studio.
Here is an example:
Scott, A. (Producer), & Harris, P. (Director). (2006). The Muppets: a celebration of 30 years [Motion picture]. United States: Henson Associates.
Note that the name of the movie should be italicized. Also, include the words "Producer" and "Director" in parentheses as described, as well as the words "Motion picture" in brackets.