Cita APA (7th ed.)

Krugman, P. R., Obstfeld, M., & Melitz, M. J. (2018). International economics: Theory and policy (11th ed.). Pearson.

Cita Chicago (17th ed.)

Krugman, Paul R., Maurice Obstfeld, i Marc J. Melitz. International Economics: Theory and Policy. 11th ed. Boston: Pearson, 2018.

Cita MLA (9th ed.)

Krugman, Paul R., et al. International Economics: Theory and Policy. 11th ed. Pearson, 2018.