APA-referens (7:e uppl.)

Gupta, P., & Hira D.S. (2020). Operations Research (7th.). S.Chand Publisher.

Chicago-referens (17:e uppl.)

Gupta, P.K, och Hira D.S. Operations Research. 7th. New Delhi: S.Chand Publisher, 2020.

MLA-referens (9:e uppl.)

Gupta, P.K, och Hira D.S. Operations Research. 7th. S.Chand Publisher, 2020.