1. M. Sitinjak, Daniel Dido Jantce T.J., and J. Suwita, "Analysis and Design of Administrative Information Systems for English Courses at the Intensive English Course in Ciledug Tangerang," Ipsikom, vol. 8, no. 1, 2020.
2. R. Agrawal and M. Batra, "A Detailed Study on Text Mining Techniques," Int. J. Soft Comput. Eng., no. 26, pp. 2231–2307, 2013.
3. S. Dang and PH Ahmad, "A Review of Text Mining Techniques Associated with Various Application Areas," Int. J. Sci. Res., vol. 4, no. 2, pp. 2319–7064, 2015.
4. A survey of methods to ease the development of highly multilingual text mining applications
5. Effective Pattern Discovery for Text Mining