APA Style
Manullang, .
(2006-2009).
Dasar-Dasar Manajemen
.
Yogyakarta:
Gadjah Mada University Press.
MLA Style
Manullang, .
"Dasar-Dasar Manajemen".
Yogyakarta:
Gadjah Mada University Press,
2006-2009.
Text.