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