Dyfyniad APA

Ekelund, R. B., & Tollison, R. D. (1994). Microeconomics (4th ed.). Harper Collins.

Dyfyniad Arddull Chicago

Ekelund, Robert B., and Robert D. Tollison. Microeconomics. 4th ed. New York, N.Y: Harper Collins, 1994.

Dyfyniad MLA

Ekelund, Robert B., and Robert D. Tollison. Microeconomics. 4th ed. Harper Collins, 1994.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.