BILAS, R. A. (1985). Microeconomic theory.-- Ed.2. McGraw-Hill Book.
Lua i Stíl Chicago (17ú heag.)BILAS, Richard A. Microeconomic Theory.-- Ed.2. Auckland: McGraw-Hill Book, 1985.
Lua MLA (9ú heag.)BILAS, Richard A. Microeconomic Theory.-- Ed.2. McGraw-Hill Book, 1985.
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