Cita APA (7a ed.)

Verderber, R. F. (1982). The challenge of effective speaking (5th ed.). Wadsworth.

Cita Chicago Style (17a ed.)

Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Califonia: Wadsworth, 1982.

Cita MLA (9a ed.)

Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Wadsworth, 1982.