Tangawuningsih, Asriani, et al. “Formulation Of Handsanitizer Extract Ganitri Leave (Elaeocarpus Ganitrus Roxb) With The Variation Of Carbopol 940 Against Eschericia Coli Bacteria”. Prosiding University Research Colloquium, Dec. 2021, pp. 804-1, https://repository.urecol.org/index.php/proceeding/article/view/1646.