APA (7e ed.) Bronvermelding

Krugman, P. R., & Obstfeld, M. (1994). International economics: Theory and policy (3rd.ed.). Harper Collins.

Chicago (17e ed.) Bronvermelding

Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. 3rd.ed. Harper: Harper Collins, 1994.

MLA (9e ed.) Bronvermelding

Krugman, Paul R., en Maurice Obstfeld. International Economics: Theory and Policy. 3rd.ed. Harper Collins, 1994.