Παραπομπή σε μορφή APA (7η εκδ.)

United Nations Department of Economic and Social Information and Policy Analysis. (1995). The challenge of urbanization: The world's large cities. United Nations.

Παραπομπή σε μορφή Chicago (17η εκδ.)

United Nations Department of Economic and Social Information and Policy Analysis. The Challenge of Urbanization: The World's Large Cities. New York: United Nations, 1995.

Παραπομπή σε μορφή MLA (8th εκδ.)

United Nations Department of Economic and Social Information and Policy Analysis. The Challenge of Urbanization: The World's Large Cities. United Nations, 1995.