Cita APA (7th ed.)

Osborn, M., Osborn, S., & Osborn, R. (2012). Public speaking: Finding your voice (Ninth edition.). Allyn & Bacon.

Cita Chicago (17th ed.)

Osborn, Michael, Suzanne Osborn, i Randall Osborn. Public Speaking: Finding Your Voice. Ninth edition. Boston: Allyn & Bacon, 2012.

Cita MLA (9th ed.)

Osborn, Michael, et al. Public Speaking: Finding Your Voice. Ninth edition. Allyn & Bacon, 2012.