Wahyuni, S. et al. 2023. The Effect of Different Extraction Methods on Total Tannin Content of Methanol Extract of Simpur Air Leaves (Dillenia suffruticosa). Hydrogen: Jurnal Kependidikan Kimia. 11, 6 (Dec. 2023), 889–903. DOI:https://doi.org/10.33394/hjkk.v11i6.9897.