Mariana, Andi Nana, and Amrin Amrin. “Implementasi Model Waterfall Untuk Pengembangan Sistem Informasi Surat Berjalan PKK DKI Jakarta”. JURNAL RISET KOMPUTER (JURIKOM) 6, no. 5 (November 22, 2019): 453–459. Accessed October 27, 2025. https://ejurnal.stmik-budidarma.ac.id/index.php/jurikom/article/view/1392.