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.
Citación estilo ChicagoUnited Nations. Department of Economic and Social Information and Policy Analysis Population Division and 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.
Cita MLAUnited Nations. Department of Economic and Social Information and Policy Analysis Population Division and United Nations. Department of International Economic and Social Affairs. The Sex and Age Distributions of the World Population. The 1994 revision. United Nations, 1994.