Amsury, F., N. Ruhyana, I. Saputra, and D. Sulistyowati. “CLASSIFICATION OF CUSTOMER COMPLAINTS ON INSTAGRAM COMMENTS USING NAÏVE BAYES ALGORITHM WITH N-GRAM FEATURE EXTENSION”. Jurnal Techno Nusa Mandiri, Vol. 17, no. 2, Sept. 2020, pp. 109-16, doi:10.33480/techno.v17i2.1632.