Citazione APA

Ryan, W. J. L. (1958). Price theory. Macmillan; St. Martin's Press.

Stile di citazione Chicago

Ryan, William James Louden. Price Theory. London, New York: Macmillan; St. Martin's Press, 1958.

Citazione MLA

Ryan, William James Louden. Price Theory. Macmillan; St. Martin's Press, 1958.