Tohutoro APA (7th ed.)

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

Tohutoru Kātū Chicago (17th ed.)

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

Tohutoro MLA (9th ed.)

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