Não informado. (1960). OECD Economic Surveys. Organization for Economic Co-operation and Development.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. OECD Economic Surveys. Paris: Organization for Economic Co-operation and Development, 1960.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. OECD Economic Surveys. Organization for Economic Co-operation and Development, 1960.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.