Verderber, R. F. (1991). The challenge of effective speaking (8th ed.). Wadsworth Pub. Co..
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Citação norma Chicago
Verderber, Rudolph F. The Challenge of Effective Speaking. 8th ed. Belmont, Calif.: Wadsworth Pub. Co., 1991.
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Citação norma MLA
Verderber, Rudolph F. The Challenge of Effective Speaking. 8th ed. Wadsworth Pub. Co., 1991.
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Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.