APA (7 वां संस्करण) प्रशस्ति पत्र

Hajra, S., & Ashok, K. (1977). Production in function in Indian industry. Economic and Scientific Research Foundation.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Hajra, Sridhar, और Kumar Ashok. Production in Function in Indian Industry. New Delhi: Economic and Scientific Research Foundation, 1977.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Hajra, Sridhar, और Kumar Ashok. Production in Function in Indian Industry. Economic and Scientific Research Foundation, 1977.