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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNational Planning Institute, Afaf Fouad, Saleh El Adawy, এবং amani omar. The Current Development in the Methodology and Applications of Operations Operations Research: Obstacles and Prospects in Developing Countries. cairo: National Planning Institute،, 1993.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিNational Planning Institute, et al. The Current Development in the Methodology and Applications of Operations Operations Research: Obstacles and Prospects in Developing Countries. National Planning Institute،, 1993.