Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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