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Gaya APA
The AMA Handbook of Business Letters. (2012).
New York:
AMACOM.
Gaya Chicago
The AMA Handbook of Business Letters.
.
New York:
AMACOM,
2012.
Text.
Gaya MLA
The AMA Handbook of Business Letters.
.
New York:
AMACOM,
2012.
Text.
Gaya Turabian
The AMA Handbook of Business Letters.
New York:
AMACOM,
2012.
Print.