Lucas, S. E. (2004). The art of pubilic speaking (8th ed.). New York: McGraw Hill.
Trích dẫn kiểu ChicagoLucas, Stephen E. The Art of Pubilic Speaking. 8th ed. New York: McGraw Hill, 2004.
Deismireacht MLALucas, Stephen E. The Art of Pubilic Speaking. 8th ed. New York: McGraw Hill, 2004.
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