Romli, Ikhsan, Fairuz Kharida, and Chandra Naya. “Determination of Customer Satisfaction of Tax Service Office Services Using C4.5 and PSO”. Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) 4, no. 2 (April 20, 2020): 296 - 302. Accessed June 4, 2025. https://mail.jurnal.iaii.or.id/index.php/RESTI/article/view/1718.