Dumayas, Diana Rose, Glenn Ford Montebon, Christopher John Reloj, Franslyn May San Diego, Jazreel Marie Tamayo, and Ira Valenzuela. 2018. “Transportable Water Purifying Device Using Bio Sand Filtration and Ultraviolet Light Treatment With Android Application for Monitoring”. Journal of Telecommunication, Electronic and Computer Engineering (JTEC) 10 (1-4):169-73. https://jtec.utem.edu.my/jtec/article/view/3612.