Haderiah, H., S. Sulasmi, and E. Erlani. “Effectiveness of Simple Screening Media of Activated Chorcoal and Zeolite to Reduce Waste Water Levels in Laundry Detergent”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 3, Oct. 2015, pp. 180-6, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4676.