APA (7th ed.) Citation

Gupta, P. K., & Hira, D. S. (1995). Problems in Operations Research (2nd ed.). S. Chand & Co..

Chicago Style (17th ed.) Citation

Gupta, P. K., and D. S. Hira. Problems in Operations Research. 2nd ed. New Delhi: S. Chand & Co., 1995.

MLA (9th ed.) Citation

Gupta, P. K., and D. S. Hira. Problems in Operations Research. 2nd ed. S. Chand & Co., 1995.