Romli, I., Fairuz Kharida and Chandra Naya (2020) “Determination of Customer Satisfaction of Tax Service Office Services Using C4.5 and PSO”, Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi), 4(2), pp. 296 - 302. doi: 10.29207/resti.v4i2.1718.