Gupta, P. K. (1994). Operation Research. Sultan Chand & Sons.
Cita Chicago (17th ed.)Gupta, P. K. Operation Research. New Delhi: Sultan Chand & Sons, 1994.
Cita MLA (9th ed.)Gupta, P. K. Operation Research. Sultan Chand & Sons, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.