Rudolf f. verderber. (2012). The Challenge of effective speaking. Australia: Wadsworth.
Chicago Style CitationRudolf f. verderber. The Challenge of Effective Speaking. Australia: Wadsworth, 2012.
MLA CitationRudolf f. verderber. The Challenge of Effective Speaking. Australia: Wadsworth, 2012.
Warning: These citations may not always be 100% accurate.