APA-Zitierstil (7. Ausg.)

Verderber, R. F. (1991). The challenge of effective speaking (8th ed.). Wadsworth Pub. Co..

Chicago-Zitierstil (17. Ausg.)

Verderber, Rudolph F. The Challenge of Effective Speaking. 8th ed. Belmont, Calif.: Wadsworth Pub. Co., 1991.

MLA-Zitierstil (9. Ausg.)

Verderber, Rudolph F. The Challenge of Effective Speaking. 8th ed. Wadsworth Pub. Co., 1991.