Nicholson, W. (2002). Microeconomic theory: Basic principles and extensions (8th ed.). South-Western.
Lua i Stíl Chicago (17ú heag.)Nicholson, Walter. Microeconomic Theory: Basic Principles and Extensions. 8th ed. Australia: South-Western, 2002.
Lua MLA (9ú heag.)Nicholson, Walter. Microeconomic Theory: Basic Principles and Extensions. 8th ed. South-Western, 2002.
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