LEBA, Maria Aloisia Uron; TUKAN, Maria Benedikta; KOMISIA, Faderina. pH Indicator Paper by Immobilizing Turmeric Rhizome Ethanol Extract on Filter Paper. Sains Natural: Journal of Biology and Chemistry, [S. l.], v. 12, n. 2, p. 45–53, 2022. DOI: 10.31938/jsn.v12i2.377. Disponível em: https://ejournalunb.ac.id/JSN/article/view/377. Acesso em: 18 may. 2026.