APA Citatie

Krugman, P. R. (1994). International economics: Theory and policy. New York: HarperCollins College Publishers.

Chicago Style citaat

Krugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.

MLA citatie

Krugman, Paul R. International Economics: Theory and Policy. New York: HarperCollins College Publishers, 1994.

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