Ledgrad, Henry, author
Science Research Association, 1981
Buku Teks
Pratt, Terrence W., author
Prentice-Hall, 1975
Buku Teks
Sethi, Ravi, author
Addison-Wesley, 1989
Buku Teks
Sethi, Ravi, author
Addison-Wesley, 1989
Buku Teks
Tennent, R.D., author
Prentice-Hall, 1981
Buku Teks