Dyfyniad APA

Case, K. E., & Fair, R. C. (2004). Principles of economics (7th ed.). Prentice Hall.

Dyfyniad Arddull Chicago

Case, Karl E., and Ray C. Fair. Principles of Economics. 7th ed. Upper Saddle River, N.J.: Prentice Hall, 2004.

Dyfyniad MLA

Case, Karl E., and Ray C. Fair. Principles of Economics. 7th ed. Prentice Hall, 2004.

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