Pulukadang, S. H. V., and Magfira. “Manufacture Indicator Paper for BSL or Small Bungur Extract (Lagerstroemia Indica L) As an Indicators Alternative of Acid-Base”. Jurnal Akademika Kimia, vol. 11, no. 3, Aug. 2022, pp. 165-7, doi:10.22487/j24775185.2022.v11.i3.pp165-175.