Não informado. (2004). AT&T Bell Laboratories Technical Journal. American Telephone and Telegraph Company.
Lua i Stíl Chicago (17ú heag.)Não informado. AT&T Bell Laboratories Technical Journal. New York: American Telephone and Telegraph Company, 2004.
Lua MLA (8ú heag.)Não informado. AT&T Bell Laboratories Technical Journal. American Telephone and Telegraph Company, 2004.
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