Tohutoro APA (7th ed.)
Verderber, R. F. (1991). Essentials of informative speaking. Wadsworth.
Tohutoru Kātū Chicago (17th ed.)
Verderber, Rudolph F. Essentials of Informative Speaking. Califonia: Wadsworth, 1991.
Tohutoro MLA (9th ed.)
Verderber, Rudolph F. Essentials of Informative Speaking. Wadsworth, 1991.
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