Dyfyniad APA

Dolan, E. G., & Lindsey, D. E. (1991). Economics (6th ed.). Dryden Press.

Dyfyniad Arddull Chicago

Dolan, Edwin G., and David Earl Lindsey. Economics. 6th ed. Chicago: Dryden Press, 1991.

Dyfyniad MLA

Dolan, Edwin G., and David Earl Lindsey. Economics. 6th ed. Dryden Press, 1991.

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