Nurdalila Saji, and Nur Aslini Roslan. “A Prototype Design of Water Filtration System and Recycling System for Flushing Toilet”. Progress in Engineering Application and Technology 1, no. 1 (December 11, 2020): 1–12. Accessed June 30, 2022. https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/97.