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Sistem Informasi Penjualan Obat Pada Apotek Pharmacy Menggunakan Model Waterfall. CONTAR : Jurnal Ilmu Komputer, [S. l.], v. 4, n. 1, 2026. DisponÃvel em: https://www.journal.unwira.ac.id/CONTAR/article/view/5860. Acesso em: 25 aug. 2026.