Dyfyniad APA

Osborn, M. . .., & Osborn,Suzanne. (2006). Public speaking (6th ed.). Biztantra.

Dyfyniad Arddull Chicago

Osborn, Michael ., and Osborn,Suzanne. Public Speaking. 6th ed. New Delhi: Biztantra, 2006.

Dyfyniad MLA

Osborn, Michael ., and Osborn,Suzanne. Public Speaking. 6th ed. Biztantra, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.