Verderber, R. F. (1982). The challenge of effective speaking (5th ed.). Wadsworth.
芝加哥风格引文Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Califonia: Wadsworth, 1982.
MLA引文Verderber, Rudolph F. The Challenge of Effective Speaking. 5th ed. Wadsworth, 1982.
警告：这些引文格式不一定是100％准确.