Cita APA (7th ed.)

Osborn, M., & Osborn, S. (1991). Public speaking. Houghton Mifflin.

Cita Chicago (17th ed.)

Osborn, Michael, i Suzanne Osborn. Public Speaking. Boston: Houghton Mifflin, 1991.

Cita MLA (9th ed.)

Osborn, Michael, i Suzanne Osborn. Public Speaking. Houghton Mifflin, 1991.