Rusidah, Yunita, Lailatul Farikhah, and Yayuk Mundriyastutik. 2021. “Qualitative Analysis Of Bottled Drinking Water And Refilled Drinking Water Sold Around University Of Muhammadiyah”. Prosiding University Research Colloquium, December, 63-77. https://repository.urecol.org/index.php/proceeding/article/view/1773.