APA (7e ed.) Bronvermelding
Krugman, P. R. (1988). International economics: Theory and policy. Scott, Foresman and Company.
Chicago (17e ed.) Bronvermelding
Krugman, Paul R. International Economics: Theory and Policy. Boston: Scott, Foresman and Company, 1988.
MLA (9e ed.) Bronvermelding
Krugman, Paul R. International Economics: Theory and Policy. Scott, Foresman and Company, 1988.
Let op: Deze citaties zijn niet altijd 100% accuraat.