Aripin, Ahmad Nurul, and Sri Mujiyono. “School Information System Innovation Using CodeIgniter 3 to Optimize Services in Elementary Schools”. ELSE (Elementary School Education Journal): Jurnal Pendidikan dan Pembelajaran Sekolah Dasar 9, no. 2 (September 20, 2025). Accessed December 5, 2025. https://journal.um-surabaya.ac.id/pgsd/article/view/24245.