Cita APA (7th ed.)

Gupta, P. K., & Hira, D. S. Operations Research. S. Chand & Company.

Cita Chicago (17th ed.)

Gupta, P. K., i D. S. Hira. Operations Research. New Delhi: S. Chand & Company.

Cita MLA (9th ed.)

Gupta, P. K., i D. S. Hira. Operations Research. S. Chand & Company.