Lucas, S. (1995). The art of public speaking (5th ed.). McGraw-Hill.
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Dyfyniad Arddull Chicago
Lucas, Stephen. The Art of Public Speaking. 5th ed. New York: McGraw-Hill, 1995.
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Dyfyniad MLA
Lucas, Stephen. The Art of Public Speaking. 5th ed. McGraw-Hill, 1995.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.