Sakti, Bima, Rafif Aprizki Saragih, and Riki Hamdani. “Web-Based Service Complaints App Web-Based Service Complaints Application At Class II Immigration Office of Pematangsiantar”. Journal of Computer Science and Informatics Engineering 1, no. 2 (April 29, 2022): 54–65. Accessed October 6, 2025. https://journal.aira.or.id/index.php/cosie/article/view/43.