Gaya APA
Selling: Principles and Methods. (1981).
Illinois:
Richard D. Irwin Inc..
Gaya Chicago
Selling: Principles and Methods.
Ed. 7.
Illinois:
Richard D. Irwin Inc.,
1981.
.
Gaya MLA
Selling: Principles and Methods.
Ed. 7.
Illinois:
Richard D. Irwin Inc.,
1981.
.
Gaya Turabian
Selling: Principles and Methods.
Illinois:
Richard D. Irwin Inc.,
1981.
.