International telecommunication union. (1979). Eighteenth report by the International telecommunication union on telecommunication and the peaceful uses of outer space. Geneva: International telecommunication union.
Trích dẫn kiểu ChicagoInternational telecommunication union. Eighteenth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1979.
Trích dẫn MLAInternational telecommunication union. Eighteenth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1979.
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