Citazione Stile APA (7a Edizione)

Krugman, P. R., & Obstfeld, M. (2003). International economics: Theory and policy (6th ed.). Pearson Education Inc..

Citazione stile Chigago Style (17a edizione)

Krugman, Paul R., e Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Boston ; New Delhi: Pearson Education Inc., 2003.

Citatione MLA (8a ed.)

Krugman, Paul R., e Maurice Obstfeld. International Economics: Theory and Policy. 6th ed. Pearson Education Inc., 2003.