F. Pramono, Didi Rosiyadi, and Windu Gata, “Integrasi N-gram, Information Gain, Particle Swarm Optimation di Naïve Bayes untuk Optimasi Sentimen Google Classroom ”, J. RESTI (Rekayasa Sist. Teknol. Inf.) , vol. 3, no. 3, pp. 383–388, Dec. 2019, doi: 10.29207/resti.v3i3.1119.