Epstein, Benjamin
CRC Press (Taylor & Francis Group), 2008
Buku Teks SO
Shannon, Claude E.
University of Illinois Press, 1964
Buku Teks
Henderson, James M.
McGraw-Hill, 1980
Buku Teks
Barnett, Stephen
Clarendon Press, 1990
Buku Teks
Baldock, G.R.
Ellis Horwood, 1981
Buku Teks SO