edited by R.S. Sharpe
Academic Press, 1982
Buku Teks
edited by Tom M. Mitchell, Jaime G. Carbonell, Ryszard S. Michalski
Kluwer Academic Publishers, 1986
Buku Teks
Athanassios Jimoyiannis, editor
Springer, 2012
eBooks
edited by Douglas A. Grouws
Macmillan Library Reference, 1992
Buku Referensi
Rossman, Gretchen B.
Sage, 2003
Buku Teks SO