sack, k., & linsel, h. (1966). general organization of planning of industry (ed. 2.). National Planning Institute.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিsack, kurt, এবং hermann linsel. General Organization of Planning of Industry. ed. 2. cairo: National Planning Institute, 1966.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিsack, kurt, এবং hermann linsel. General Organization of Planning of Industry. ed. 2. National Planning Institute, 1966.