Cita APA (7th ed.)

Coopman, S. J., & Lull, J. (2011). Public speaking: The evolving art (Enhanced edition.). Wadsworth/Cengage Learning.

Cita Chicago (17th ed.)

Coopman, Stephanie J., i James Lull. Public Speaking: The Evolving Art. Enhanced edition. Australia: Wadsworth/Cengage Learning, 2011.

Cita MLA (9th ed.)

Coopman, Stephanie J., i James Lull. Public Speaking: The Evolving Art. Enhanced edition. Wadsworth/Cengage Learning, 2011.