APA Citation

Rudolf f. verderber. (2012). The Challenge of effective speaking. Australia: Wadsworth.

Chicago Style Citation

Rudolf f. verderber. The Challenge of Effective Speaking. Australia: Wadsworth, 2012.

MLA Citation

Rudolf f. verderber. The Challenge of Effective Speaking. Australia: Wadsworth, 2012.

Warning: These citations may not always be 100% accurate.