Zuhriansah, Alfi Laila, et al. “Influence of Fly Ash Addition on Nutrient and Microbial Population in Citronella Leaf Waste Composting”. Jurnal Biologi Tropis, vol. 25, no. 4, Oct. 2025, pp. 5085-92, doi:10.29303/jbt.v25i4.9907.