Harris, David, author
Thomson Course Technology, 2003
Buku Teks
Neward, Ted, author
Addison-Wesley, 2005
Buku Teks
Bourne, S.R., author
Prentice-Hall, 1992
Buku Teks
Downes, Valerie A., author
Prentice-Hall, 1982
Buku Teks
Amadio, William, author
Mitchell Publishing, 1989
Buku Teks