Varian, H. R. (1999). Intermediate microeconomics: A modern approach (5th ed.). W.W. Norton & Co..
Lua i Stíl Chicago (17ú heag.)Varian, Hal R. Intermediate Microeconomics: A Modern Approach. 5th ed. New York: W.W. Norton & Co., 1999.
Lua MLA (8ú heag.)Varian, Hal R. Intermediate Microeconomics: A Modern Approach. 5th ed. W.W. Norton & Co., 1999.
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