BINGHAM, R. C. (1987). Study guide to accompany McConnell: Economics.-- Ed.10. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)BINGHAM, Robert C. Study Guide to Accompany McConnell: Economics.-- Ed.10. New York: McGraw-Hill, 1987.
Lua MLA (9ú heag.)BINGHAM, Robert C. Study Guide to Accompany McConnell: Economics.-- Ed.10. McGraw-Hill, 1987.
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