Harvard Business Review on the Persuasive Leader
2008 年出版205 页ISBN:9781422124994;1422124991
STATISTICS FOR THE BEHAVIORAL SCIENCES SECOND EDITION
1997 年出版401 页ISBN:155934637X
Before Speech The Beginning of Interpersonal Communication
1979 年出版400 页ISBN:052129522X
Education in Central America and the Caribbean
1990 年出版322 页ISBN:9780415038850;0415038855