APA (7e ed.) Bronvermelding

KRUGMAN, P. R. (2012). International economics: Theory & policy ninth edition. Pearson Education Limited.

Chicago (17e ed.) Bronvermelding

KRUGMAN, Paul R. International Economics: Theory & Policy Ninth Edition. Pearson Education Limited, 2012.

MLA (8e ed.) Bronvermelding

KRUGMAN, Paul R. International Economics: Theory & Policy Ninth Edition. Pearson Education Limited, 2012.

Let op: Deze citaties zijn niet altijd 100% accuraat.