Sembiring, Aggryppyne Keyne Oberta, et al. “UTILIZATION OF CINNAMON BARK (CINNAMOMUM BURMANNI) EXTRACT AS A NATURAL INHIBITOR FOR THE CONTROL OF CORROSION RATE IN IRON METAL”. Jurnal Ilmu Pendidikan Indonesia, vol. 11, no. 3, Nov. 2023, pp. 140-5, doi:10.31957/jipi.v11i3.2341.