APA
Kothari C., . (2004). An Introduction to Operational Research. New Delhi: Vikash Publishing.
Chicago
Kothari C.R, . 2004. An Introduction to Operational Research. New Delhi: Vikash Publishing.
Harvard
Kothari C., . (2004). An Introduction to Operational Research. New Delhi: Vikash Publishing.
MLA
Kothari C.R, . An Introduction to Operational Research. New Delhi: Vikash Publishing. 2004.