Não informado. (1967). OECD Economic Outlook. Organization for Economic Co-operation and Development.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. OECD Economic Outlook. Paris: Organization for Economic Co-operation and Development, 1967.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. OECD Economic Outlook. Organization for Economic Co-operation and Development, 1967.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.