APA (7th ed.) Zitazioa
Clayton, G. E. (2001). Economics: Principles and Practices. mcGraw-Hill.
Chicago Style (17th ed.) Zitazioa
Clayton, Gray E. Economics: Principles and Practices. New york: mcGraw-Hill, 2001.
MLA (9th ed.) Zitazioa
Clayton, Gray E. Economics: Principles and Practices. mcGraw-Hill, 2001.
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