Cita APA (7th ed.)

National Association of Broadcasters & Fletcher, J. E. (1988). Broadcast research definitions. National Association of Broadcasters.

Cita Chicago (17th ed.)

National Association of Broadcasters i James E. Fletcher. Broadcast Research Definitions. Washington, D.C: National Association of Broadcasters, 1988.

Cita MLA (9th ed.)

National Association of Broadcasters i James E. Fletcher. Broadcast Research Definitions. National Association of Broadcasters, 1988.