2021. Design of School Information System Using Waterfall Method (Case study: MTsN 8 Bantul): Rancang Bangun Sistem Inormasi Sekolah Menggunakan Metode Waterfall (Studi kasus : MTsN 8 Bantul) . Procedia of Engineering and Life Science. 1, 2 (July 2021). DOI:https://doi.org/10.21070/pels.v1i2.1020.