Jatmika, Sunu, et al. “Implementation of Text Mining for Book Classification Based on Dewey Decimal Clasification (Ddc) In Stmik Asia Malang Library Based Vector Space Model”. POSITIF : Jurnal Sistem Dan Teknologi Informasi, vol. 4, no. 2, Nov. 2018, pp. 103-12, doi:10.31961/positif.v4i2.567.