Indes Maharani Handayani, and Nana Supriatna. “Systematic Literature Review: Analysis Implementation of Water, Sanitation, and Hygiene (WASH) Programs in Elementary Schools”. International Conference on Elementary Education, Vol. 6, no. 1, June 2024, pp. 206-14, http://proceedings2.upi.edu/index.php/icee/article/view/3603.