APA (7th ed.) Zitazioa
Krugman, P. R., & Obstfeld, . M. (2003). International economics: Theory and policy (Sixth ,ed.). Addison Wesley.
Chicago Style (17th ed.) Zitazioa
Krugman, Paul R., eta Maurice Obstfeld. International Economics: Theory and Policy. Sixth ,ed. Boston San Francisco New York: Addison Wesley, 2003.
MLA (9th ed.) Zitazioa
Krugman, Paul R., eta Maurice Obstfeld. International Economics: Theory and Policy. Sixth ,ed. Addison Wesley, 2003.
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