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Dyfyniad Arddull ChicagoVarian,Hal R. Intermediate Microeconomics: A Modern Approach. 5. U S A: W W Norton & Company, 1999.
Dyfyniad MLAVarian,Hal R. Intermediate Microeconomics: A Modern Approach. 5. W W Norton & Company, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.