APA (7th ed.) Citation

Krugman, P. R., & Obstfeld, M. (2003). International economics: Theory, and policy. (6.ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory, and Policy. (6.ed.). Boston: Addison-Wesley, 2003.

MLA (9th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory, and Policy. (6.ed.). Addison-Wesley, 2003.