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