Lucas, E. S. (2004). The art of public speaking: Kèm sách. Boston: McGraw-Hill.
शिकागो स्टाइल उद्धरणLucas, E. Stenphen. The Art of Public Speaking: Kèm Sách. Boston: McGraw-Hill, 2004.
एमएलए उद्धरणLucas, E. Stenphen. The Art of Public Speaking: Kèm Sách. Boston: McGraw-Hill, 2004.
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