Não informado. (2001). The Bell System Technical Journal. American Telephone and Telegraph Company.
Chicago-referens (17:e uppl.)Não informado. The Bell System Technical Journal. New York: American Telephone and Telegraph Company, 2001.
MLA-referens (8:e uppl.)Não informado. The Bell System Technical Journal. American Telephone and Telegraph Company, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.