International telecommunication union. (1973). Twelth report by the International telecommunication union on telecommunication and the peaceful uses of outer space. Geneva: International telecommunication union.
Chicago-tyylinen lähdeviittausInternational telecommunication union. Twelth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1973.
MLA-viiteInternational telecommunication union. Twelth Report By the International Telecommunication Union On Telecommunication and the Peaceful Uses of Outer Space. Geneva: International telecommunication union, 1973.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.