APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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