APA aipamena

Krugman, P. R., & Obstfeld, M. (2006). International economics: Theory and policy (7th ed.). Addison-Wesley.

Chicago Style aipamena

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Boston, MA: Addison-Wesley, 2006.

MLA aipamena

Krugman, Paul R., and Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Addison-Wesley, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.