Akbar, M. F., and A. Fauzi. “Application of Waterfall Method In Design Of Web-Based Library Information System Program Case Study at Elementary School Warungnangka Kabupaten Subang”. JURNAL TEKNOLOGI DAN OPEN SOURCE, Vol. 6, no. 1, June 2023, pp. 72 -85, doi:10.36378/jtos.v6i1.3065.