International telecommunication union. (1973). Twelth report by the International telecommunication union on telecommunication and the peaceful uses of outer space. Geneva: International telecommunication union.
استشهاد بنمط شيكاغوInternational telecommunication union. Twelth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1973.
MLA استشهادInternational telecommunication union. Twelth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.