Gaya APA
Mandino, Og. (1988).
The Greatest salesman in the world .
New York:
Bantam Books.
Gaya Chicago
Mandino, Og.
The Greatest salesman in the world.
New York:
Bantam Books,
1988.
Buku.
Gaya MLA
Mandino, Og.
The Greatest salesman in the world.
New York:
Bantam Books,
1988.
Buku.
Gaya Turabian
Mandino, Og.
The Greatest salesman in the world.
New York:
Bantam Books,
1988.
Buku.