APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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