APA (7th ed.) Citation
Samuelson, P. A., & Nordhaus, W. D. (1989). Economics (13. ed.). McGraw-Hill Book Company.
Chicago Style (17th ed.) Citation
Samuelson, Paul A., and William D. Nordhaus. Economics. 13. ed. New York: McGraw-Hill Book Company, 1989.
MLA (9th ed.) Citation
Samuelson, Paul A., and William D. Nordhaus. Economics. 13. ed. McGraw-Hill Book Company, 1989.
Warning: These citations may not always be 100% accurate.