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শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCorporations, United Nations. Centre on Transnational. Alternative Arrangements for Petroleum Development: A Guide for Govt. Policy-makers and Negotiations. The author, 1982.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCorporations, United Nations. Centre on Transnational. Alternative Arrangements for Petroleum Development: A Guide for Govt. Policy-makers and Negotiations. The author, 1982.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.