United Nations. Dept. of International Economic and Social Affairs. (1990). Stable population age distributions. United Nations.
Chicago-Zitierstil (17. Ausg.)United Nations. Dept. of International Economic and Social Affairs. Stable Population Age Distributions. New York: United Nations, 1990.
MLA-Zitierstil (9. Ausg.)United Nations. Dept. of International Economic and Social Affairs. Stable Population Age Distributions. United Nations, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.