Feier, R. (1930). Elements of economics. College entrance book co..
Chicagoスタイル(17版)引用形式Feier, Richard. Elements of Economics. New York: College entrance book co., 1930.
MLA(8版)引用形式Feier, Richard. Elements of Economics. College entrance book co., 1930.
警告: この引用は必ずしも正確ではありません.