Não informado. (1947). Monthly Bulletin of Statistics. United Nations, Department of Economic and Social Affairs, Statistical Office.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Monthly Bulletin of Statistics. New York: United Nations, Department of Economic and Social Affairs, Statistical Office, 1947.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Monthly Bulletin of Statistics. United Nations, Department of Economic and Social Affairs, Statistical Office, 1947.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.