APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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