Gaya APA
Henry, Porter. (1987).
Secrets of the master sellers .
New York:
Ama.
Gaya Chicago
Henry, Porter.
Secrets of the master sellers.
New York:
Ama,
1987.
Text.
Gaya MLA
Henry, Porter.
Secrets of the master sellers.
New York:
Ama,
1987.
Text.
Gaya Turabian
Henry, Porter.
Secrets of the master sellers.
New York:
Ama,
1987.
Print.