Gupta Prem Kuma. (2012). Operations Research. S.Chand.
Dyfyniad Arddull ChicagoGupta Prem Kuma. Operations Research. New Delhi: S.Chand, 2012.
Dyfyniad MLAGupta Prem Kuma. Operations Research. S.Chand, 2012.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.