Riyanti, Riyanti, Putut Marwoto, Sigit Priatmoko, and Edy Cahyono. 2022. “The The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora Coccinea Linn) With Variances of Solvent and Soaking Period”. Jurnal Penelitian Pendidikan IPA 8 (4):1694-99. https://doi.org/10.29303/jppipa.v8i4.1494.