Gaya APA
Russell, Frederic A.. (1988).
Selling : principles and practices .
New York:
McGraw Hill.
Gaya Chicago
Russell, Frederic A..
Selling : principles and practices.
New York:
McGraw Hill,
1988.
Text.
Gaya MLA
Russell, Frederic A..
Selling : principles and practices.
New York:
McGraw Hill,
1988.
Text.
Gaya Turabian
Russell, Frederic A..
Selling : principles and practices.
New York:
McGraw Hill,
1988.
Print.