APA-referens (7:e uppl.)

Pugel, T. A. (2016). International economics (16th ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Pugel, Thomas A. International Economics. 16th ed. New York, NY: McGraw-Hill, 2016.

MLA-referens (9:e uppl.)

Pugel, Thomas A. International Economics. 16th ed. McGraw-Hill, 2016.