Não informado. (1971). QUARTERLY ECONOMIC REVIEW OF OIL IN THE FAR EAST AND AUSTRALASIA. Economist Intelligence Unit.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. QUARTERLY ECONOMIC REVIEW OF OIL IN THE FAR EAST AND AUSTRALASIA. London: Economist Intelligence Unit, 1971.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. QUARTERLY ECONOMIC REVIEW OF OIL IN THE FAR EAST AND AUSTRALASIA. Economist Intelligence Unit, 1971.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.