Cowell, T. L. (1999). Public speaking: Challenges and choices (Student workbook). Oklahoma: Alliance Press.
Trích dẫn kiểu ChicagoCowell, Tara L. Public Speaking: Challenges and Choices (Student Workbook). Oklahoma: Alliance Press, 1999.
MLA CitationCowell, Tara L. Public Speaking: Challenges and Choices (Student Workbook). Oklahoma: Alliance Press, 1999.
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