Bilas, R. A. (1971). Microeconomic theory (2nd ed.). McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)Bilas, Richard A. Microeconomic Theory. 2nd ed. New york: McGraw-Hill, 1971.
Tohutoro MLA (9th ed.)Bilas, Richard A. Microeconomic Theory. 2nd ed. McGraw-Hill, 1971.
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