Citazione APA

Krugman, P. R., Obstfeld, M., & Melitz, M. J. (2015). International economics: Theory and policy (Tenth edition.). Pearson.

Stile di citazione Chicago

Krugman, Paul R., Maurice Obstfeld, e Marc J. Melitz. International Economics: Theory and Policy. Tenth edition. Boston: Pearson, 2015.

Citazione MLA

Krugman, Paul R., et al. International Economics: Theory and Policy. Tenth edition. Pearson, 2015.