Cita APA

Verderber, R. F. (1985). The challenge of effective speaking (6a. ed.). Belmont, Calif.: Wadsworth Pub. Co..

Citación estilo Chicago

Verderber, Rudolph F. The Challenge of Effective Speaking. 6a. ed. Belmont, Calif.: Wadsworth Pub. Co., 1985.

Cita MLA

Verderber, Rudolph F. The Challenge of Effective Speaking. 6a. ed. Belmont, Calif.: Wadsworth Pub. Co., 1985.