Balon, R. E. (1988). The rules of the ratings game. National Association of Broadcasters.
Dyfyniad Arddull ChicagoBalon, Robert E. The Rules of the Ratings Game. Washington, D.C: National Association of Broadcasters, 1988.
Dyfyniad MLABalon, Robert E. The Rules of the Ratings Game. National Association of Broadcasters, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.