APA (7th ed.) Zitazioa

Krugman, P. R. (1988). International economics: Theory and policy. Scott, Foresman.

Chicago Style (17th ed.) Zitazioa

Krugman, Paul R. International Economics: Theory and Policy. Glenview: Scott, Foresman, 1988.

MLA (9th ed.) Zitazioa

Krugman, Paul R. International Economics: Theory and Policy. Scott, Foresman, 1988.