FRANK, R. H. (2011). Principles of Microeconomics 2nd ed. Mc GrawHill.
Lua i Stíl Chicago (17ú heag.)FRANK, Robert H. Principles of Microeconomics 2nd Ed. Mc GrawHill, 2011.
Lua MLA (8ú heag.)FRANK, Robert H. Principles of Microeconomics 2nd Ed. Mc GrawHill, 2011.
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