United Nations. Department of Economic and Social Information and Policy Analysis Population Division & United Nations. Department of International Economic and Social Affairs. (1994). The Sex and age distributions of the world population (The 1994 revision.). United Nations.
Citazione stile Chigago Style (17a edizione)United Nations. Department of Economic and Social Information and Policy Analysis Population Division e United Nations. Department of International Economic and Social Affairs. The Sex and Age Distributions of the World Population. The 1994 revision. New York: United Nations, 1994.
Citatione MLA (9a ed.)United Nations. Department of Economic and Social Information and Policy Analysis Population Division e United Nations. Department of International Economic and Social Affairs. The Sex and Age Distributions of the World Population. The 1994 revision. United Nations, 1994.