Zaenal Mustofa, et al. “Optimalisasi Sistem Chatbot Layanan Pelanggan E-Commerce Melalui Kombinasi Rule-Based Dan Algoritma K-Nearest Neighbor (KNN)”. Jurnal Publikasi Ilmu Komputer Dan Multimedia, vol. 5, no. 1, Mar. 2026, pp. 320-5, https://journalcenter.org/index.php/jupikom/article/view/5272.