Maus, Rex., editor
McGraw-Hill, 1991
Buku Referensi
Shafer, Glenn, author
Society for Industrial and Applied Mathematics, 1996
eBooks
Keravnou, E. T., author
McGraw-Hill, 1986
Buku Teks
Alty, J.L., author
NCC Publications, 1984
Buku Teks
edited by, Frederick Hayes-Roth, Donald A. Waterman and Douglas Lenat
Addison-Wesley, 1983
Buku Teks