Cita APA (7th ed.)

Ryan, W. J. L. (1960). Price theory. Macmillan.

Cita Chicago (17th ed.)

Ryan, William James Louden. Price Theory. London: Macmillan, 1960.

Cita MLA (9th ed.)

Ryan, William James Louden. Price Theory. Macmillan, 1960.