S. Joko Raharjo, A. In Oktavia, and L. Oktavia Rahayu, “Education and Mentoring on Organic Fertilizer Using PGPR Biodecomposer for Karang Taruna BABE in Bakalan, Bululawang, Malang Regency”, engagement, vol. 8, no. 2, pp. 469 -482, Nov. 2024.