APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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