Não informado. (1982). British Telecommunications Engineering. Institution of British Telecommunications Engineers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. British Telecommunications Engineering. London: Institution of British Telecommunications Engineers, 1982.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. British Telecommunications Engineering. Institution of British Telecommunications Engineers, 1982.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.