Cita APA (7th ed.)

Pugel, T. A. (2007). International economics (13th ed.). McGraw-Hill Irwin.

Cita Chicago (17th ed.)

Pugel, Thomas A. International Economics. 13th ed. Boston: McGraw-Hill Irwin, 2007.

Cita MLA (8th ed.)

Pugel, Thomas A. International Economics. 13th ed. McGraw-Hill Irwin, 2007.