Verderber, R. F. (1982). The challenge of effective speaking (5th ed.). Wadsworth.
Chicagoスタイル(17版)引用形式Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Califonia: Wadsworth, 1982.
MLA(9版)引用形式Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Wadsworth, 1982.
警告: この引用は必ずしも正確ではありません.