APA (7e ed.) Bronvermelding
Krugman, P. R., & Obstfeld, M. (2000). International economics: Theory and policy (5th ed.). Addison-Wesley.
Chicago (17e ed.) Bronvermelding
Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. 5th ed. Reading Mass.: Addison-Wesley, 2000.
MLA (9e ed.) Bronvermelding
Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. 5th ed. Addison-Wesley, 2000.
Let op: Deze citaties zijn niet altijd 100% accuraat.