APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.