APA (7th ed.) Zitazioa

Osborn, M. (1988). Public speaking. Houghton Mifflin Co..

Chicago Style (17th ed.) Zitazioa

Osborn, Michael. Public Speaking. Boston: Houghton Mifflin Co., 1988.

MLA (9th ed.) Zitazioa

Osborn, Michael. Public Speaking. Houghton Mifflin Co., 1988.