Hira, D. S., & Gupta, P. K. (1997). Operations Research. Modern Book Centre.
Chicago-čujuhus (17. p.)Hira, D. S., juo P. K. Gupta. Operations Research. New Delhi: Modern Book Centre, 1997.
MLA-čujuhus (9. p.)Hira, D. S., juo P. K. Gupta. Operations Research. Modern Book Centre, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.