The first element (e.g., director, composer, conductor, performer, title, etc.) depends on the desired emphasis. You may include other pertinent information, such as the writers, performers, or producers, between the title and the distributor.
Title of Work. Name of director, conductor, performer, etc. Creator, date of creation. Source or distributor.
Format. Date of access for media from the web.
The Great Train Robbery. Dir. Edward Porter. Thomas Edison, 1903. Internet Archive. Web. 9 May 2007.
The Secret of Life. Narr. David Suzuki. 8 episodes. PBS. WETA, Washington. 26-29 Sept. 1993. Television.
"Death and Society." Narr. Joanne Silberner. Weekend Edition Sunday. National Public Radio. WNYC, New York, 25 Jan. 1998. Radio.
The Cure. Instant Karma: The Amnesty International Campaign to Save Darfur. Geffen, 2007. CD.
Sondheim, Stephen. Passion. Orch. Jonathan Tunick. Perf. Donna Murphy, Jere Shea, and Marin Mazzle. Cond. Paul Gemignani. Angel, 1994. LP.
It's a Wonderful Life. Dir. Frank Capra. RKO, 1946. Film.
Medicine at the Crossroads. Prod. WNET. PBS Video, 1993. Videocassette.
Renoir, Jean, dir. Grand Illusion. Perf. Jean Gabin and Erich von Stroheim. 1938. Voyager, 1987. DVD.
Aristotle. The Complete Works of Aristotle: The Revised Oxford Translation. Ed. Jonathan Barnes. 2 vols. Princeton: Princeton UP, 1984. CD-ROM.
In general, determine the type of work you are citing (book, sound recording, photograph, etc.) and follow the guidelines for formatting that entry. Then, where the medium of publication should be, include the digital file format, followed by the word file.
American Council of Learned Societies. Commission on Cyberinfrastructure for the Humanities and Social Sciences. Our
Cultural Commonwealth. New York: ACLS, 2006. PDF file.
Hudson, Jennifer, perf. "And I Am Telling You I'm Not Going." Dreamgirls: Music from the Motion Picture. Sony BMG, 2006.
MP3 file.