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Παραπομπή σε μορφή Chicago (17η εκδ.).Krugman, Paul R., και Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Boston, MA: Addison-Wesley, 2006.
Παραπομπή σε μορφή MLA (9th εκδ.).Krugman, Paul R., και Maurice Obstfeld. International Economics: Theory and Policy. 7th ed. Addison-Wesley, 2006.