Ignizio, James P.
Prentice-Hall, 1991
Buku Teks SO
Waterman, Donald A.
Addison-Wesley Publishing, 1986
Buku Referensi
edited by Bruce G. Buchanan and Edward H. Shortliffe
Addison-Wesley, 1984
Buku Teks SO
Negoita, Constantin Virgil
The Benjamin Cumming Pub., 1985
Buku Teks SO
Alty, J.L.
NCC Publications, 1984
Buku Teks SO