APA (7th ed.) Citation

Krugman, P. R., & Wells, R. (2006). Macroeconomics (2. print.). Worth Publ.

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Robin Wells. Macroeconomics. 2. print. New York, NY: Worth Publ, 2006.

MLA (9th ed.) Citation

Krugman, Paul R., and Robin Wells. Macroeconomics. 2. print. Worth Publ, 2006.