Cita APA (7a ed.)

Richard G. Lipsey, K. A. C. (1999). Principles of economics (9th ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Richard G. Lipsey, K. Alec Chrystal. Principles of Economics. 9th ed. Oxford: Oxford University Press, 1999.

Cita MLA (9a ed.)

Richard G. Lipsey, K. Alec Chrystal. Principles of Economics. 9th ed. Oxford University Press, 1999.