APA (7th ed.) Citation

Samuelson, P. A., & Nordhaus, W. D. (1989). Macroeconomics: A version of economics (13th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Samuelson, Paul A., and William D. Nordhaus. Macroeconomics: A Version of Economics. 13th ed. McGraw-Hill, 1989.