Cita APA (7th ed.)

Hira, D. S., & Gupta, P. K. (1995). Problems in Operation Research (Revised ed.). S. Chand & Company.

Cita Chicago (17th ed.)

Hira, D. S., i P. K. Gupta. Problems in Operation Research. Revised ed. New Delhi: S. Chand & Company, 1995.

Cita MLA (9th ed.)

Hira, D. S., i P. K. Gupta. Problems in Operation Research. Revised ed. S. Chand & Company, 1995.