Citazione APA

Lipsey, R. G. (1999). Principles of economics (9th ed.). Oxford university Press.

Stile di citazione Chicago

Lipsey, Richard G. Principles of Economics. 9th ed. New Delhi: Oxford university Press, 1999.

Citazione MLA

Lipsey, Richard G. Principles of Economics. 9th ed. Oxford university Press, 1999.