Bettinghaus, E. P., & Cody, M. J. (1968). Persuasive communication (5th ed.). Harcourt Brace Javanovich.
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Dyfyniad Arddull Chicago
Bettinghaus, Erwin P., and Michael J. Cody. Persuasive Communication. 5th ed. Fort Worth: Harcourt Brace Javanovich, 1968.
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Dyfyniad MLA
Bettinghaus, Erwin P., and Michael J. Cody. Persuasive Communication. 5th ed. Harcourt Brace Javanovich, 1968.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.