Não informado. (1976). Quarterly oil statistics. Organization for Economic Co-operation and Development.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Quarterly Oil Statistics. Paris: Organization for Economic Co-operation and Development, 1976.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Quarterly Oil Statistics. Organization for Economic Co-operation and Development, 1976.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.