Traister, Robert J., author
Elex Media Komputindo, 1987
Buku Teks
Artikel Jurnal
Roddy, Dennis, author
Pergamon Press, 1978
Buku Teks
Colclaser, Roy A., author
John Wiley & Sons, 1980
Buku Teks
Horenstein, Mark N.
Prentice Hall International, Inc., 1996
Buku Teks