United Nations. Economic Commission for Europe & United Nations Population Fund. (1992). Changing population age structures: Demographic and economic consequences and implications. United Nations.
Παραπομπή σε μορφή Chicago (17η εκδ.)United Nations. Economic Commission for Europe και United Nations Population Fund. Changing Population Age Structures: Demographic and Economic Consequences and Implications. Geneva: United Nations, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)United Nations. Economic Commission for Europe και United Nations Population Fund. Changing Population Age Structures: Demographic and Economic Consequences and Implications. United Nations, 1992.
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