Sethi, Ravi, author
Addison-Wesley, 1989
Buku Teks
Tennent, R.D., author
Prentice-Hall, 1981
Buku Teks
Welland, Ray, author
Pitman, 1993
Buku Teks
Ledgrad, Henry, author
Science Research Association, 1981
Buku Teks
Organick, Elliott I., author
Academic Press, 1978
Buku Teks