APA način citiranja

Hira, D. S., & Prem kumar gupta. (1999). Operations research. S. Chand and Company Ltd.

Čikaški stil citiranja

Hira, D S., i Prem kumar gupta. Operations Research. New Delhi: S. Chand and Company Ltd, 1999.

MLA način citiranja

Hira, D S., i Prem kumar gupta. Operations Research. S. Chand and Company Ltd, 1999.