APA (7e ed.) Bronvermelding

Krugman, P. R., & Obstfeld, M. (2009). International economics: Theory and policy (Eighth edition.). Pearson Addison-Wesley.

Chicago (17e ed.) Bronvermelding

Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. Eighth edition. Boston, Mass: Pearson Addison-Wesley, 2009.

MLA (9e ed.) Bronvermelding

Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. Eighth edition. Pearson Addison-Wesley, 2009.