Ellingsworth, Huber W.
Speech and social action : a strategy of oral communication
Prentice-Hall, 1967
 Buku Teks
O`Connor, J. Regis
High-impact public speaking for business and the professions
NTC, 1997
 Buku Teks
Orey, Maureen
Communication skills training
American Society for Training and Development Press;, 2004
 eBooks
Andrews, Patricia Hayes
Communication for business and the professions
Waveland, 1986
 Buku Teks
Jenings, Judy
Communication basics
[American Society for Training and Development Press;, ], 2004
 eBooks