APA (7th ed.) Citation

Krugman, P. R., & Obstfeld, M. (2006). International economics: Theory and policy (7th ed.). Pearson Addison-Wesley.

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Boston, Mass: Pearson Addison-Wesley, 2006.

MLA (8th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Pearson Addison-Wesley, 2006.