Forsyth, Patrick, author
The art of successful business communication
Institution of Engineering and Technology, 2008
 eBooks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Quible, Zone K.
Business Communication
Prentice-Hall International, 1996
 Koleksi Publik
Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
 Buku Teks
Ewald, Helen Rothschild, author
Business communication
Prentice-Hall International, 1997
 Buku Teks
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