APA (7th ed.) Zitazioa

Krugman, P. R., Obstfeld, M., & Melitz, M. J. (2022). International economics: Theory and policy (12th ed.). Pearson.

Chicago Style (17th ed.) Zitazioa

Krugman, Paul R., Maurice Obstfeld, eta Marc J. Melitz. International Economics: Theory and Policy. 12th ed. Harlow, England: Pearson, 2022.

MLA (9th ed.) Zitazioa

Krugman, Paul R., et al. International Economics: Theory and Policy. 12th ed. Pearson, 2022.