APA-viite (7. p.)

Pugel, T. A. (2007). International Economics (13th.). Tata McGraw Hill Education (India) Private Limited.

Chicago-viite (17. p.)

Pugel, Thomas A. International Economics. 13th. New Delhi: Tata McGraw Hill Education (India) Private Limited, 2007.

MLA-viite (9. p.)

Pugel, Thomas A. International Economics. 13th. Tata McGraw Hill Education (India) Private Limited, 2007.