APA সাইটেশন

Gupta,P.K, & Hira,D.S. (1991). Problems in Operations Research: Principles and solutions. S.Chand & company Ltd.

শিকাগো স্টাইলে সাইটেশন

Gupta,P.K, এবং Hira,D.S. Problems in Operations Research: Principles and Solutions. New Delhi: S.Chand & company Ltd, 1991.

এমএলএ সাইটেশন

Gupta,P.K, এবং Hira,D.S. Problems in Operations Research: Principles and Solutions. S.Chand & company Ltd, 1991.