APA (7 वां संस्करण) प्रशस्ति पत्र

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

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

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

एमएलए (9वां संस्करण) प्रशस्ति पत्र

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