Krugman, P. R., Obstfeld, M., & Melitz, M. J. (2023). International economics: Theory & policy (Twelfth edition.). Pearson.

Krugman, Paul R., Maurice Obstfeld, and Marc J. Melitz. International Economics: Theory & Policy. Twelfth edition. Harlow, England: Pearson, 2023.

Krugman, Paul R., et al. International Economics: Theory & Policy. Twelfth edition. Pearson, 2023.