Tobing, M., P. Suarya, and P. U. Prayikaputri. “USE OF BENTONITE-CHITOSAN MIXTURE AS AN AMMONIUM SULFATE CARRIER IN MANUFACTURING SLOW RELEASE FERTILIZER: -”. Jurnal Ilmu Pendidikan Indonesia, vol. 12, no. 1, Mar. 2024, pp. 52-62, doi:10.31957/jipi.v12i1.3500.