APA
Gupta P. K. . H. D. S., . (2018). Operations research7th ed. S.Chand and company: New Delhi.
Chicago
Gupta Prem Kumar Hira D S, . 2018. Operations research7th ed. S.Chand and company: New Delhi.
Harvard
Gupta P. K. . H. D. S., . (2018). Operations research7th ed. S.Chand and company: New Delhi.
MLA
Gupta Prem Kumar Hira D S, . Operations research7th ed. S.Chand and company: New Delhi. 2018.