Harmon, Paul
John Wiley & Sons, 1985
Buku Teks SO
edited by Daniel A. DeSalvo and Jay Liebowitz
Prentice-Hall, 1990
Buku Teks
Negoita, Constantin Virgil
The Benjamin Cumming Pub., 1985
Buku Teks
Alty, J.L.
NCC Publications, 1984
Buku Teks
edited by, Frederick Hayes-Roth, Donald A. Waterman and Douglas Lenat
Addison-Wesley, 1983
Buku Teks