Ewald, Helen Rothschild
Business communication
Prentice Hall International, 1997
 Buku Teks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Krizan, A. C. (Buddy), author
Business communication
Thomson, 2008
 Buku Teks
Ewald, Helen Rothschild, author
Business communication
Prentice-Hall International, 1997
 Buku Teks
Evans, Nicholas D.
Business agility : strategies for gaining competitive advantage through mobile business solutions
Prentice-Hall, 2002
 Buku Teks
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