Citazione Stile APA (7a Edizione)

Krugman, P. R., & Obstfeld, M. (2009). International economics: Theory and policy (Eighth edition.). Pearson Addison-Wesley.

Citazione stile Chigago Style (17a edizione)

Krugman, Paul R., e Maurice Obstfeld. International Economics: Theory and Policy. Eighth edition. Boston: Pearson Addison-Wesley, 2009.

Citatione MLA (8a ed.)

Krugman, Paul R., e Maurice Obstfeld. International Economics: Theory and Policy. Eighth edition. Pearson Addison-Wesley, 2009.