Dyfyniad APA

Mankiw, N. G. (2012). Principles of economics 6th ed. South-Western.

Dyfyniad Arddull Chicago

Mankiw, N. Gregory. Principles of Economics 6th Ed. South-Western, 2012.

Dyfyniad MLA

Mankiw, N. Gregory. Principles of Economics 6th Ed. South-Western, 2012.

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