APA (7th ed.) Citation

Samuelson, P. A., & Nordhaus, W. D. (1989). Economics (13th ed.). McGraw-Hill Book.

Chicago Style (17th ed.) Citation

Samuelson, Paul A., and William D. Nordhaus. Economics. 13th ed. New York: McGraw-Hill Book, 1989.

MLA (8th ed.) Citation

Samuelson, Paul A., and William D. Nordhaus. Economics. 13th ed. McGraw-Hill Book, 1989.