APA (7th ed.) Citation

Krugman, P. R., & Obstfeld, M. (2003). International economics: Theory and policy (6th ed.). Pearson Education Inc..

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Boston ; New Delhi: Pearson Education Inc., 2003.

MLA (8th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Pearson Education Inc., 2003.