Demeny, P. G. (1981). The North-South income gap: A demographic perspective. Population Council.
Chicagoスタイル(17版)引用形式Demeny, Paul George. The North-South Income Gap: A Demographic Perspective. New York: Population Council, 1981.
MLA(9版)引用形式Demeny, Paul George. The North-South Income Gap: A Demographic Perspective. Population Council, 1981.
警告: この引用は必ずしも正確ではありません.