APA استشهاد

Gupta & Hira. (1979). Operations research. Sulthan Chand & Co.

استشهاد بنمط شيكاغو

Gupta و Hira. Operations Research. New Delhi: Sulthan Chand & Co, 1979.

MLA استشهاد

Gupta و Hira. Operations Research. Sulthan Chand & Co, 1979.