Gupta, P., & Hira D.S. (2020). Operations Research (7th.). S.Chand Publisher.
Chicago Style aipamenaGupta, P.K, and Hira D.S. Operations Research. 7th. New Delhi: S.Chand Publisher, 2020.
MLA aipamenaGupta, P.K, and Hira D.S. Operations Research. 7th. S.Chand Publisher, 2020.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.