iSpeak improve your speech credibility

書誌詳細
主要な著者:	Nelson, Paul E. (Paul Edward) 1941- (著者), Titsworth, Scott (著者), Pearson, Judy (著者)
フォーマット:	図書
言語:	English
出版事項:	New York McGraw-Hill Companies, Inc. [2014]
版:	Fifth edition, 2013 edition.
主題:	Public speaking.