Manurung, Asima, Yan Batara Putra Siringoringo, and J.L. Marpaung. “Satisfaction Analysis of The Establishment of a Website-Based Rank System Using Customer Satisfaction Index (CSI) And Importance Performance Analysis (IPA) Methods”. Sinkron : jurnal dan penelitian teknik informatika 8, no. 2 (June 13, 2024): 1233-1240. Accessed May 24, 2026. https://jurnal.polgan.ac.id/index.php/sinkron/article/view/13599.