Lucas, S. (2004). The art of public speaking (8th ed.). Boston: McGraw-Hill.
Trích dẫn kiểu ChicagoLucas, Stephen. The Art of Public Speaking. 8th ed. Boston: McGraw-Hill, 2004.
Deismireacht MLALucas, Stephen. The Art of Public Speaking. 8th ed. Boston: McGraw-Hill, 2004.
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