O`Connor, J. Regis
High-impact public speaking for business and the professions
NTC, 1997
Buku Teks
O`Hair, Dan
Strategic communication : in business and the professions
Kencana, 2009
Buku Teks
O`Hair, Dan
Strategic communication in business and the professions
Allyn and Bacon, 2011
Buku Teks
O`Hair, Dan
Strategic communication in business and the professions
Allyn and Bacon, 2011
Buku Teks
Treece, Malra
Communication for business and the professions
Allyn and Bacon, 1989
Buku Teks