United Nations. Department of Economic and Social Affairs. Population Division. (2007). World population ageing 2007. United Nations, Department of Economic and Social Affairs, Population Division.
Chicagoスタイル(17版)引用形式United Nations. Department of Economic and Social Affairs. Population Division. World Population Ageing 2007. New York: United Nations, Department of Economic and Social Affairs, Population Division, 2007.
MLA(9版)引用形式United Nations. Department of Economic and Social Affairs. Population Division. World Population Ageing 2007. United Nations, Department of Economic and Social Affairs, Population Division, 2007.
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