Bilas, R. A. (1971). Microeconomic theory (2nd ed.). McGraw-Hill.
Dyfyniad Arddull ChicagoBilas, Richard A. Microeconomic Theory. 2nd ed. New york: McGraw-Hill, 1971.
Dyfyniad MLABilas, Richard A. Microeconomic Theory. 2nd ed. McGraw-Hill, 1971.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.