“Pengembangan Sistem Informasi Penjualan Di Happiness Jersey Menggunakan Metode Extreme Programming Berbasis Web: Indonesia”. Niskala Wastukancana 1, no. 1 (September 14, 2026): 238–251. Accessed October 17, 2026. https://jurnal.wastukancana.ac.id/index.php/niskala/article/view/605.