Gaya APA
ma.hum, M, R, S.
(1987).
Management of the sales force
(
7th ed)
.
homewood, illinois:
Irwin.
Gaya MLA
ma.hum, Muhib, Rosyidi,, S.th.i.,.
"Management of the sales force".
7th ed
homewood, illinois:
Irwin,
1987.
Text.