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
edited by Larry Kerschberg
The Benjamin Cumming , 1986
Buku Teks
Waterman, Donald A.
Addison-Wesley Publishing, 1986
Buku Referensi