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Dyfyniad Arddull ChicagoLowery, Shearon, and Melvin Lawrence De Fleur. Milestones in Mass Communication Research: Media Effects. 2d ed. New York: Longman, 1988.
Dyfyniad MLALowery, Shearon, and Melvin Lawrence De Fleur. Milestones in Mass Communication Research: Media Effects. 2d ed. Longman, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.