APA (7 वां संस्करण) प्रशस्ति पत्र

Gupta, P. K. (2016). Problems in Operations Research (4th.). S.Chand.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Gupta, Prem Kumar. Problems in Operations Research. 4th. New Delhi: S.Chand, 2016.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Gupta, Prem Kumar. Problems in Operations Research. 4th. S.Chand, 2016.