Gaya APA
Simatupang, L. et al
(2000).
Asas-asas penelitian behavorial
(
3)
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Simatupang, Landung. et al.
"Asas-asas penelitian behavorial".
3
Yogyakarta:
Gadjah Mada University Press,
2000.
Text.