Mohd Azly, Nur Fatin Syahirah, et al. “Effectiveness of Solar Distillation System in Treating Direct Discharge of Car Wash Wastewater”. International Journal of Integrated Engineering, vol. 17, no. 7, Dec. 2025, pp. 181-8, https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/21610.