KERLINGER, F. N. (1993). Asas-asas Penelitian Behavioral Fred N. Kerlinger; Penerjemah Landung R. Simatupang; Editor Koesoemanto. Gadjah Mada University Press.
Lua i Stíl Chicago (17ú heag.)KERLINGER, Fred N. Asas-asas Penelitian Behavioral Fred N. Kerlinger; Penerjemah Landung R. Simatupang; Editor Koesoemanto. Gadjah Mada University Press, 1993.
Lua MLA (8ú heag.)KERLINGER, Fred N. Asas-asas Penelitian Behavioral Fred N. Kerlinger; Penerjemah Landung R. Simatupang; Editor Koesoemanto. Gadjah Mada University Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.