Παραπομπή APA

Gupta,Prem kumar, & Hira,D.S. (2012). Problems in Operations Research: Principles and solutions. S Chand.

Παραπομπή Chicago Style

Gupta,Prem kumar, και Hira,D.S. Problems in Operations Research: Principles and Solutions. Newdelhi: S Chand, 2012.

Παραπομπή MLA

Gupta,Prem kumar, και Hira,D.S. Problems in Operations Research: Principles and Solutions. S Chand, 2012.