Case, K. E., & Fair, R. C. (1999). Principles of microeconomics (5th ed.). Prentice Hall.
Dyfyniad Arddull ChicagoCase, Karl E., and Ray C. Fair. Principles of Microeconomics. 5th ed. Upper Saddle River, N.J: Prentice Hall, 1999.
Dyfyniad MLACase, Karl E., and Ray C. Fair. Principles of Microeconomics. 5th ed. Prentice Hall, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.