Engleberg, I. N. (1993). The principles of public presentation. HarperCollins.
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Dyfyniad Arddull Chicago
Engleberg, Isa N. The Principles of Public Presentation. New York: HarperCollins, 1993.
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Dyfyniad MLA
Engleberg, Isa N. The Principles of Public Presentation. HarperCollins, 1993.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.