APA (7th ed.) Zitazioa

Pugel, T. (2009). International economics (14th ed.). McGraw-Hill.

Chicago Style (17th ed.) Zitazioa

Pugel, Thomas. International Economics. 14th ed. Boston: McGraw-Hill, 2009.

MLA (9th ed.) Zitazioa

Pugel, Thomas. International Economics. 14th ed. McGraw-Hill, 2009.