Dyfyniad APA

Ekelund, R. B., & Hébert, R. F. (1990). A history of economic theory and method (3rd ed.). McGraw-Hill.

Dyfyniad Arddull Chicago

Ekelund, Robert B., and Robert F. Hébert. A History of Economic Theory and Method. 3rd ed. New York: McGraw-Hill, 1990.

Dyfyniad MLA

Ekelund, Robert B., and Robert F. Hébert. A History of Economic Theory and Method. 3rd ed. McGraw-Hill, 1990.

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