Nigam, B. (1996). Management and evaluation of distance education. Kanishka.
Chicago-čujuhus (17. p.)Nigam, B. Management and Evaluation of Distance Education. New delhi: Kanishka, 1996.
MLA-čujuhus (9. p.)Nigam, B. Management and Evaluation of Distance Education. Kanishka, 1996.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.