Dyfyniad APA
National Association of Broadcasters. (1967). Standard definitions of broadcast research terms. National Association of Broadcasters.
Dyfyniad Arddull Chicago
National Association of Broadcasters. Standard Definitions of Broadcast Research Terms. Washington, D.C.: National Association of Broadcasters, 1967.
Dyfyniad MLA
National Association of Broadcasters. Standard Definitions of Broadcast Research Terms. National Association of Broadcasters, 1967.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.