APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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