Y. P. Situmeang, I. D. N. Sudita, and M. Suarta, “Manure Utilization from Cows, Goats, and Chickens as Compost, Biochar, and Poschar in Increasing the Red Chili Yield”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 9, no. 6, pp. 2088–2095, Dec. 2019.