Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Koleksi Publik
Ewald, Helen Rothschild
Business communication
Prentice Hall International, 1997
 Buku Teks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Woolcott, Lysbeth A., author
Komunikasi bisnis untuk sekretaris = Communication for business and scretarial students / Lysbeth .A. Woolcott, Wendy R. Unwin; alih bahasa, Evita Kandom
Erlangga , 1993
 Buku Teks
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