Crowley, D. J. (1982). Understanding Communication. Gordon & Breach.
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Dyfyniad Arddull Chicago
Crowley, D J. Understanding Communication. New York: Gordon & Breach, 1982.
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Dyfyniad MLA
Crowley, D J. Understanding Communication. Gordon & Breach, 1982.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.