APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Krugman, Paul R., Maurice Obstfeld, and Marc J. Melitz. International Economics: Theory and Policy. Eleventh edition. New York: Pearson, 2018.

MLA (8th ed.) Citation

Krugman, Paul R., et al. International Economics: Theory and Policy. Eleventh edition. Pearson, 2018.