Lafrance, Pierre
Prentice Hall International, 1990
Buku Teks
Hancock, John C., author
McGraw-Hill, 1961
Buku Teks
Shannon, Claude E.
University of Illinois , 1964
Buku Teks
Shannon, Claude E.
University of Illinois Press, 1972
Buku Teks
West, Richard L., author
Mayfield Publishing company , 2000
Buku Teks