Gaya APA
New Sales SImplified. (2013).
New York:
AMACOM.
Gaya Chicago
New Sales SImplified.
.
New York:
AMACOM,
2013.
Text.
Gaya MLA
New Sales SImplified.
.
New York:
AMACOM,
2013.
Text.
Gaya Turabian
New Sales SImplified.
New York:
AMACOM,
2013.
Print.