iSpeak improve your speech credibility

Bibliographic Details
Main Authors:	Nelson, Paul E. (Paul Edward) 1941- (Author), Titsworth, Scott (Author), Pearson, Judy (Author)
Format:	Book
Language:	English
Published:	New York McGraw-Hill Companies, Inc. [2014]
Edition:	Fifth edition, 2013 edition.
Subjects:	Public speaking.