APA (7th ed.) Citation

Krugman, P. R., & Wells, R. (2015). Economics (4. ed.). Worth Publ.

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Robin Wells. Economics. 4. ed. New York, NY: Worth Publ, 2015.

MLA (9th ed.) Citation

Krugman, Paul R., and Robin Wells. Economics. 4. ed. Worth Publ, 2015.