United Nations. Department of International Economic and Social Affairs. (1989). The United Nations population projection computer programme: A user?s manual. United Nations.
Chicago-Zitierstil (17. Ausg.)United Nations. Department of International Economic and Social Affairs. The United Nations Population Projection Computer Programme: A User?s Manual. New York: United Nations, 1989.
MLA-Zitierstil (9. Ausg.)United Nations. Department of International Economic and Social Affairs. The United Nations Population Projection Computer Programme: A User?s Manual. United Nations, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.