Dyfyniad APA

Nordhous, W. D., & Samuelson, P. A. (1995). Economics. Mc Graw-Hill Publishing Company.

Dyfyniad Arddull Chicago

Nordhous, William D., and Paul A. Samuelson. Economics. New York: Mc Graw-Hill Publishing Company, 1995.

Dyfyniad MLA

Nordhous, William D., and Paul A. Samuelson. Economics. Mc Graw-Hill Publishing Company, 1995.

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