Bishop, C.M. (2006) Pattern recognition and machine learning. New York: Springer.
Ian H. Witten, Alistair Moffat, and Timothy C. Bell (no date) Managing Gigabytes. Morgan Kaufmann.
Manning, C.D., Raghavan, P. and Schütze, H. (2008) Introduction to information retrieval. New York: Cambridge University Press.
Pang-Ning Tan, Michael Steinbach, and Vipin Kumar (no date) Introduction to Data Mining, (First Edition). Addison Wesley.