Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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