Tohutoro APA (7th ed.)
Verderber, R. F. (1976). The challenge of effective speaking (3rd ed.). Wadsworth.
Tohutoru Kātū Chicago (17th ed.)
Verderber, Rudolph F. The Challenge of Effective Speaking. 3rd ed. Califonia: Wadsworth, 1976.
Tohutoro MLA (9th ed.)
Verderber, Rudolph F. The Challenge of Effective Speaking. 3rd ed. Wadsworth, 1976.
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