APA (7 वां संस्करण) प्रशस्ति पत्र

Jakobsen, G., & Torp, J. E. (2001). Understanding business systems in developing countries. Sage Publications.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Jakobsen, Gurli, और Jens Erik Torp. Understanding Business Systems in Developing Countries. New Delhi ; Thousand Oaks: Sage Publications, 2001.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Jakobsen, Gurli, और Jens Erik Torp. Understanding Business Systems in Developing Countries. Sage Publications, 2001.