Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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