Ryan, W. J. L. (1958). Price theory. Macmillan; St. Martin's Press.
Chicagoスタイル(17版)引用形式Ryan, William James Louden. Price Theory. London, New York: Macmillan; St. Martin's Press, 1958.
MLA(9版)引用形式Ryan, William James Louden. Price Theory. Macmillan; St. Martin's Press, 1958.
警告: この引用は必ずしも正確ではありません.