SITI NURYANTI, SITTI RAHMAWATI, ANANG WAHID MUHAMMAD DIAH, SUPRIADI. THE pH ROUTE OF ROSELLA FLOWER (HIBISCUS SABDARIFFA L) AS AN ACID-BASE INDICATOR. International Journal of Advanced Science and Technology, v. 29, n. 06, p. 1154 - 1160, 26 Apr. 2020.