Lucas, S. E. (2007). The art of public speaking. McGraw-Hill Irwin.
Trích dẫn kiểu ChicagoLucas, Stephen E. The Art of Public Speaking. McGraw-Hill Irwin, 2007.
Deismireacht MLALucas, Stephen E. The Art of Public Speaking. McGraw-Hill Irwin, 2007.
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