United Nations. Economic Commission for Europe & Stolnitz, G. J. (1992). Demographic causes and economic consequences of population aging: Europe and North America. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations. Economic Commission for Europe και George J. Stolnitz. Demographic Causes and Economic Consequences of Population Aging: Europe and North America. New York: United Nations, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations. Economic Commission for Europe και George J. Stolnitz. Demographic Causes and Economic Consequences of Population Aging: Europe and North America. United Nations, 1992.
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