Dyfyniad APA

Secord, W., Shames, G. H., & Wiig, E. H. (1994). Human communication disorders: An introduction (4th ed.). Merrill.

Dyfyniad Arddull Chicago

Secord, Wayne, George H. Shames, and Elisabeth H. Wiig. Human Communication Disorders: An Introduction. 4th ed. New York: Merrill, 1994.

Dyfyniad MLA

Secord, Wayne, et al. Human Communication Disorders: An Introduction. 4th ed. Merrill, 1994.

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