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.
Cytowanie według stylu Chicago (wyd. 17)United Nations. Department of Economic and Social Information and Policy Analysis Population Division i 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.
Cytowanie według stylu MLA (wyd. 9)United Nations. Department of Economic and Social Information and Policy Analysis Population Division i United Nations. Department of International Economic and Social Affairs. The Sex and Age Distributions of the World Population. The 1994 revision. United Nations, 1994.