Gaya APA

Worthington, B. (1977). Arid Land Irrigation in Developing Countries : Environmental Problem and Effects (Edisi 1). Inggris: Pergamon Press.

Gaya MLA

Worthington, Barton. "Arid Land Irrigation in Developing Countries : Environmental Problem and Effects". Edisi 1 Inggris: Pergamon Press, 1977. Text.