International telecommunication union. (1979). Eighteenth report by the International telecommunication union on telecommunication and the peaceful uses of outer space. Geneva: International telecommunication union.
শিকাগো স্টাইলে সাইটেশনInternational telecommunication union. Eighteenth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1979.
এমএলএ সাইটেশনInternational telecommunication union. Eighteenth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1979.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.