LUCAS, S. E. (1989). The Art Of Public Speaking Stephen E. Lucas. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)LUCAS, Stephen E. The Art Of Public Speaking Stephen E. Lucas. McGraw-Hill, 1989.
Lua MLA (8ú heag.)LUCAS, Stephen E. The Art Of Public Speaking Stephen E. Lucas. McGraw-Hill, 1989.
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