Lucas, S. (2001). The art of public speaking (7th ed.). McGraw Hill.
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Dyfyniad Arddull Chicago
Lucas, Stephen. The Art of Public Speaking. 7th ed. Boston, Mass.: McGraw Hill, 2001.
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Dyfyniad MLA
Lucas, Stephen. The Art of Public Speaking. 7th ed. McGraw Hill, 2001.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.