Não informado. (1982). British Telecommunications Engineering. Institution of British Telecommunications Engineers.
Chicago-referens (17:e uppl.)Não informado. British Telecommunications Engineering. London: Institution of British Telecommunications Engineers, 1982.
MLA-referens (8:e uppl.)Não informado. British Telecommunications Engineering. Institution of British Telecommunications Engineers, 1982.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.