Dyfyniad APA

(1988). Economics Principles And Policy William J. Baumal [et Al.]. Harcourt Brace Jovanovich.

Dyfyniad Arddull Chicago

Economics Principles And Policy William J. Baumal [et Al.]. Harcourt Brace Jovanovich, 1988.

Dyfyniad MLA

Economics Principles And Policy William J. Baumal [et Al.]. Harcourt Brace Jovanovich, 1988.

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