Cita APA (7th ed.)
Pugel, T. A. (2009). International economics (14th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
Pugel, Thomas A. International Economics. 14th ed. Boston: McGraw-Hill, 2009.
Cita MLA (9th ed.)
Pugel, Thomas A. International Economics. 14th ed. McGraw-Hill, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.