Gaya APA
Pederson, C, A. et al
(1981).
Selling: Principles and Methods
(
Edisi 7)
.
America:
Richard D. Irwin.
Gaya MLA
Pederson, Carlton, A. et al.
"Selling: Principles and Methods".
Edisi 7
America:
Richard D. Irwin,
1981.
Text.