Παραπομπή APA

Gupta, P. K. (2002). Operations research. S.Chand.

Παραπομπή Chicago Style

Gupta, Prem Kumar. Operations Research. New Delhi: S.Chand, 2002.

Παραπομπή MLA

Gupta, Prem Kumar. Operations Research. S.Chand, 2002.