Não informado. (1970). Working paper series. National Bureau of Economic Research.
Chicagoスタイル(17版)引用形式Não informado. Working Paper Series. Cambridge, Mass: National Bureau of Economic Research, 1970.
MLA(8版)引用形式Não informado. Working Paper Series. National Bureau of Economic Research, 1970.
警告: この引用は必ずしも正確ではありません.