Cita APA (7a ed.)

National Information Center for Educational Media (U.S.). (1971). Index to producers & distributors. National Information Center for Educational Media, University of Southern California.

Cita Chicago Style (17a ed.)

National Information Center for Educational Media (U.S.). Index to Producers & Distributors. Los Angeles, Calif.: National Information Center for Educational Media, University of Southern California, 1971.

Cita MLA (8a ed.)

National Information Center for Educational Media (U.S.). Index to Producers & Distributors. National Information Center for Educational Media, University of Southern California, 1971.