Dyfyniad APA

Lipsey, R. G., & Chrystal, K. A. (1999). Principles of economics (9th.ed.). Oxford Univ..

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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