Παραπομπή APA

Prem Kumar Gupta, D. (2009). Problems in operations research: Principles and solutions. S. Chand.

Παραπομπή Chicago Style

Prem Kumar Gupta, D.S. Problems in Operations Research: Principles and Solutions. New Delhi: S. Chand, 2009.

Παραπομπή MLA

Prem Kumar Gupta, D.S. Problems in Operations Research: Principles and Solutions. S. Chand, 2009.