Nigam, B. (1996). Management and evaluation of distance education. Kanishka.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNigam, B. Management and Evaluation of Distance Education. New delhi: Kanishka, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNigam, B. Management and Evaluation of Distance Education. Kanishka, 1996.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.