PENERAPAN MODEL WATERFALL PADA APLIKASI PENJUALAN ONLINE KOPERASI RANCAGE KAMPUNG KALENG BOGOR. jitk [Internet]. 2019 Sep. 1 [cited 2026 Feb. 12];5(1):145-50. Available from: https://ejournal.nusamandiri.ac.id/ejurnal/index.php/jitk/article/view/692