APA (7th ed.) Zitazioa
Armstrong, F. C. (1985). The business of economics. West Pub. Co..
Chicago Style (17th ed.) Zitazioa
Armstrong, Fred C. The Business of Economics. St. Paul: West Pub. Co., 1985.
MLA (9th ed.) Zitazioa
Armstrong, Fred C. The Business of Economics. West Pub. Co., 1985.
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