Gaya APA
Subroto, B.
(2011).
Pemasaran Industri : Business to Business Marketing
(
I)
.
Yogyakarta:
Andi.
Gaya MLA
Subroto, Budiarto.
"Pemasaran Industri : Business to Business Marketing".
I
Yogyakarta:
Andi,
2011.
Text.