Não informado. (1958). Industrialization and Productivity. United Nations, Department of Economic and Social Affairs.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Industrialization and Productivity. New York: United Nations, Department of Economic and Social Affairs, 1958.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Industrialization and Productivity. United Nations, Department of Economic and Social Affairs, 1958.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.