Gaya APA
Henry, Porter. (1987).
Secrets of the Master Sellers. .
New York:
Amacom.
Gaya Chicago
Henry, Porter.
Secrets of the Master Sellers..
New York:
Amacom,
1987.
Text.
Gaya MLA
Henry, Porter.
Secrets of the Master Sellers..
New York:
Amacom,
1987.
Text.
Gaya Turabian
Henry, Porter.
Secrets of the Master Sellers..
New York:
Amacom,
1987.
Print.