Gaya APA

KERLINGER, F, N. et al (1990). Asas-asas penelitian behavioral . Yogyakarta: Gadjah Mada University Press.

Gaya MLA

KERLINGER, Fred, N.. et al. "Asas-asas penelitian behavioral". Yogyakarta: Gadjah Mada University Press, 1990. Buku.