T. Joko, D. A. C. Putri, and H. L. Dangiran, “Chitosan on Reducing Chemical Oxygen Demands in Laundry Waste Water”, IJSBAR, vol. 30, no. 1, pp. 104–111, Sep. 2016, Accessed: Sep. 11, 2025. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/6399