Use the following format as a guideline.
Example: Title of movie. Director (abbreviated as Dir.). Distribution company, year released. Format (DVD, videocassette, etc.).
In this case of "The Matrix," your citation should look like this:
The Matrix. Dir. Andy Wachowski and Larry Wachowski. Warner Bros. Pictures, 1999. DVD.
Italicize the title of the movie but do not place the title in quotations.