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Gaya APA
ProActive :Sales Management. (2010).
New York:
AMACOM.
Gaya Chicago
ProActive :Sales Management.
.
New York:
AMACOM,
2010.
Text.
Gaya MLA
ProActive :Sales Management.
.
New York:
AMACOM,
2010.
Text.
Gaya Turabian
ProActive :Sales Management.
New York:
AMACOM,
2010.
Print.