“PENENTUAN KADAR FLAVONOID TOTAL EKSTRAK AIR BUNGA ROSELLA (Hibiscus sabdariffa L) SECARA SPEKTOFOTOMETRI UV-Vis”, Journal of Pharmaceutical Science and Herbal Technology, vol. 3, no. 1, hlm. 9–15, Jul 2018, Diakses: Okt 15, 2026. Tersedia pada: https://ojs.institutnh.ac.id/index.php/jpsht/article/view/272