APA (7e ed.) Bronvermelding
Krugman, P. R., & Obstfeld, . M. (2003). International economics: Theory and policy (Sixth ,ed.). Addison Wesley.
Chicago (17e ed.) Bronvermelding
Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. Sixth ,ed. Boston San Francisco New York: Addison Wesley, 2003.
MLA (9e ed.) Bronvermelding
Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. Sixth ,ed. Addison Wesley, 2003.
Let op: Deze citaties zijn niet altijd 100% accuraat.