Mefiana, R., and A. Sugiharto. “Effectiveness Test of Activated Carbon and Rice Husk Ash in Reducing BOD and COD Levels in Laundry Liquid Waste”. Jurnal Kartika Kimia, Vol. 4, no. 2, Nov. 2021, pp. 83-88, doi:10.26874/jkk.v4i2.87.