Riyanti R, Marwoto P, Priatmoko S, Cahyono E. The The Acid-Base Indicator Paper of Extracted Ethanol from Ashoka Flower (Ixora coccinea Linn) with Variances of Solvent and Soaking Period. jppipa, pendidikan ipa, fisika, biologi, kimia [Internet]. 2022 Oct. 31 [cited 2024 Nov. 22];8(4):1694-9. Available from: https://jppipa.unram.ac.id/index.php/jppipa/article/view/1494