APA استشهاد

Gupta, P., & Hira, D. (1979). Operations research: An introduction. S chand.

استشهاد بنمط شيكاغو

Gupta, P.K, و D.S Hira. Operations Research: An Introduction. New Delhi: S chand, 1979.

MLA استشهاد

Gupta, P.K, و D.S Hira. Operations Research: An Introduction. S chand, 1979.