Enri, Ultach, and Chaerur Rozikin. “Sistem Pengaduan Kerusakan Fasilitas Ruang Kelas Berbasis Android”. SYSTEMATICS 1, no. 2 (December 1, 2019): 116–129. Accessed April 27, 2024. https://journal.unsika.ac.id/index.php/systematics/article/view/2688.