Cita APA (7th ed.)
Krugman, P. R., & Obstfeld, M. (2000). International economics: Theory and policy (5th ed.). Addison-Wesley.
Cita Chicago (17th ed.)
Krugman, Paul R., i Maurice Obstfeld. International Economics: Theory and Policy. 5th ed. Reading Mass.: Addison-Wesley, 2000.
Cita MLA (9th ed.)
Krugman, Paul R., i Maurice Obstfeld. International Economics: Theory and Policy. 5th ed. Addison-Wesley, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.