APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (8e ed.) Bronvermelding

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