Osborn, M., & Suzanne Osborn. (1988). Public Speaking. Houghton Mifflin Company.
Cita Chicago (17th ed.)Osborn, Michael, i Suzanne Osborn. Public Speaking. Boston, Massachusetts: Houghton Mifflin Company, 1988.
Cita MLA (9th ed.)Osborn, Michael, i Suzanne Osborn. Public Speaking. Houghton Mifflin Company, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.