Verderber, R. F. (1982). The challenge of effective speaking. Wadsworth Pub.
Chicagoスタイル(17版)引用形式Verderber, Rudolph F. The Challenge of Effective Speaking. Belmont, CA: Wadsworth Pub, 1982.
MLA(9版)引用形式Verderber, Rudolph F. The Challenge of Effective Speaking. Wadsworth Pub, 1982.
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