Gaya APA

KERLINGER, F, N., SIMATUPANG, L, R. (2006). Asas-asas penelitian behavioral = Foundation of behavioral research third edition (Edisi. 3, Cet. 11). Yogyakarta: Gadjah Mada University Press.

Gaya MLA

KERLINGER, FRED, N.., SIMATUPANG, LANDUNG, R.. "Asas-asas penelitian behavioral = Foundation of behavioral research third edition". Edisi. 3, Cet. 11 Yogyakarta: Gadjah Mada University Press, 2006. TEXT.