Perancangan Sistem Informasi Administrasi Pembayaran SPP Berbasis WEB pada SMA PGRI Kragilan Menggunakan Model SDLC Waterfall. Integrative Perspectives of Social and Science Journal, [S. l.], v. 3, n. 09 September, p. 268–280, 2026. Disponível em: https://ipssj.com/index.php/ojs/article/view/2006. Acesso em: 21 oct. 2026.