Yohe, G. W. (1985). Study guide to accompany Samuelson and Nordhaus Economics (12th.). McGraw-Hill Book.
Chicago Style (17th ed.) ZitazioaYohe, Gary W. Study Guide to Accompany Samuelson and Nordhaus Economics. 12th. New York: McGraw-Hill Book, 1985.
MLA (9th ed.) ZitazioaYohe, Gary W. Study Guide to Accompany Samuelson and Nordhaus Economics. 12th. McGraw-Hill Book, 1985.
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