1. Natural Language Processing and Information Retrieval;Tiwari,2008
2. C.D. Manning and H. Schutze, Foundations of Statistical Natural Language Processing, The MIT Press.
3. P. Bhattacharya, Notes on Natural Language Processing, “http://nptel.ac.in/courses/106101007/2” [last accessed on: 1-2-17].
4. The University of Sheffield, Natural Language Processing Research Group, “http://nlp.shef.ac.uk/” [last accessed on: 23-4-17].
5. New Jersey institute of Technology, Web Mining and its Latest Trends, “http://graduatedegrees.online.njit.edu/mba-resources/mba-articles/web-mining-and-its-latest-developments/” [last accessed on: 27-9-17].