Gupta Prem Kuma. (2012). Operations Research. S.Chand.
Chicago-čujuhus (17. p.)Gupta Prem Kuma. Operations Research. New Delhi: S.Chand, 2012.
MLA-čujuhus (9. p.)Gupta Prem Kuma. Operations Research. S.Chand, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.