Ling, Michelle Wang Jing, Siti Marwanis Anua, and Nurzafirah Mazlan. “Concentrations of Magnesium, Calcium and Potassium in Drinking Water; A Comparison Between Tap Water and Bore Water”. Journal of Energy and Safety Technology (JEST) 2, no. 1 (June 24, 2019). Accessed April 19, 2024. https://jest.utm.my/index.php/jest/article/view/36.