Bettinghaus, E. P. (1968). Persuasive communication. Holt, Rinehart and Winston.
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Dyfyniad Arddull Chicago
Bettinghaus, Erwin P. Persuasive Communication. New York: Holt, Rinehart and Winston, 1968.
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Dyfyniad MLA
Bettinghaus, Erwin P. Persuasive Communication. Holt, Rinehart and Winston, 1968.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.