Gaya APA
Still, R, R. (1981).
Sales Management : Decisions, Strategies, And Cases (Ed.4) (Ed. 4).
North America:
Prentice Hall.
Gaya MLA
Still, Richard, R..
"Sales Management : Decisions, Strategies, And Cases (Ed.4)".
Ed. 4
North America:
Prentice Hall,
1981.
FKSB-Komunikasi.