Παραπομπή APA

Lipsey, R. G., & Chrystal, K. A. (2002). Principles of Economics (ed.9.). Oxford University Press.

Παραπομπή Chicago Style

Lipsey, Richard G., και K. Alec Chrystal. Principles of Economics. ed.9. New Delhi: Oxford University Press, 2002.

Παραπομπή MLA

Lipsey, Richard G., και K. Alec Chrystal. Principles of Economics. ed.9. Oxford University Press, 2002.