Gupta, P., & Hira D.S. (2020). Operations Research (7th.). S.Chand Publisher.
Chicago-čujuhus (17. p.)Gupta, P.K, juo Hira D.S. Operations Research. 7th. New Delhi: S.Chand Publisher, 2020.
MLA-čujuhus (9. p.)Gupta, P.K, juo Hira D.S. Operations Research. 7th. S.Chand Publisher, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.