APA (7th ed.) Citation

Krugman, P. R., & Obstfeld, M. (1997). International economics: Theory and policy (4. ed.). Addison-Wesley.

Chicago Style (17th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 4. ed. Reading, Mass. [u.a.]: Addison-Wesley, 1997.

MLA (9th ed.) Citation

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 4. ed. Addison-Wesley, 1997.