Arnold, John, author
Prenctice-Hall, 1983
Buku Teks
Nibbelin, Michael C., author
Prentice-Hall, 1996
Buku Teks
Ingram, Robert W., author
South-Western College 2001, 2001
Buku Teks
Ingram, Robert W., author
South-Western, 2005
Multimedia
Bierman, Harold, author
Macmillan, 1959
Buku Teks