ABSENSI PEGAWAI BERBASIS ANDROID PADA SD BHAKTI MANDALA NABIRE MENGGUNAKAN METODE WATERFALL. JOISM [Internet]. 2023 Jul. 6 [cited 2025 May 13];5(1):84-8. Available from: https://devjurnal.amikom.ac.id/index.php/joism/article/view/1119