V. Chalisty and M. Hufron, “Evaluasi Kualitas Pupuk Organik Cair Urin Kambing Dan Limbah Cair Tahu Dengan Bioaktivator Propunic: Evaluation of the Quality of Liquid Organic Fertilizer From Goat Urine and Tofu Liquid Waste Using Propunic Bioactivator”, J. Livest. Animal Health, vol. 8, no. 2, pp. 65–71, Aug. 2025.