APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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