Cita APA (7th ed.)
Osborn, M. (1988). Public speaking. Houghton Mifflin Co..
Cita Chicago (17th ed.)
Osborn, Michael. Public Speaking. Boston: Houghton Mifflin Co., 1988.
Cita MLA (9th ed.)
Osborn, Michael. Public Speaking. Houghton Mifflin Co., 1988.
Atenció: Aquestes cites poden no estar 100% correctes.