Case, K. E. (1992). Principles of microeconomics (2nd ed.). Prentice Hall.
Dyfyniad Arddull ChicagoCase, Karl E. Principles of Microeconomics. 2nd ed. Englewood Cliffs, N.J: Prentice Hall, 1992.
Dyfyniad MLACase, Karl E. Principles of Microeconomics. 2nd ed. Prentice Hall, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.