Hidayattullah, M., and Y. Hapsari. “Implementasi Metode Waterfall Pada Rancang Bangun Sistem Informasi Kerja Praktik Industri”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi, Vol. 11, no. 2, Dec. 2020, pp. 85-89, doi:https://doi.org/10.31937/si.v11i2.1594.