Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
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Locker, Kitty O.
Business communicatin
McGraw-Hill, 2007
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Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
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Dumont, Raymond A.
Business communications
Little, Brown, 1985
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Quible, Zane K.
Business communication: principles and applications
Prentice-Hall, 1996
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