Cita APA (7th ed.)
Valenti, J. (1982). Speak up with confidence: How to prepare, learn, and deliver effective speeches. Morrow.
Cita Chicago (17th ed.)
Valenti, Jack. Speak Up with Confidence: How to Prepare, Learn, and Deliver Effective Speeches. New York: Morrow, 1982.
Cita MLA (9th ed.)
Valenti, Jack. Speak Up with Confidence: How to Prepare, Learn, and Deliver Effective Speeches. Morrow, 1982.
Atenció: Aquestes cites poden no estar 100% correctes.