(1981). Population projections: Problems and solutions. Report of the Workshop on Population Projections. Budapest, Hungary 17-28 march 1980. United Nations.
Chicago-Zitierstil (17. Ausg.)Population Projections: Problems and Solutions. Report of the Workshop on Population Projections. Budapest, Hungary 17-28 March 1980. New York: United Nations, 1981.
MLA-Zitierstil (9. Ausg.)Population Projections: Problems and Solutions. Report of the Workshop on Population Projections. Budapest, Hungary 17-28 March 1980. United Nations, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.