Collinge, R. A., & Ayers, R. M. (1997). Economics by design: Principles and issues. Upper Saddle River, N.J: Prentice Hall.
Παραπομπή Chicago StyleCollinge, Robert A., και Ronald M. Ayers. Economics By Design: Principles and Issues. Upper Saddle River, N.J: Prentice Hall, 1997.
Παραπομπή MLACollinge, Robert A., και Ronald M. Ayers. Economics By Design: Principles and Issues. Upper Saddle River, N.J: Prentice Hall, 1997.
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