Styawan AA, Putri A, Ramadhani Nur Cholifa R. Tannin Analysis of Red Roselle Petals (Hibiscus Sabdariffa, L.) using Permanganometry Method. UJAS [Internet]. 2021 Apr. 20 [cited 2024 Sep. 23];1(1):1-8. Available from: http://snp.ums.ac.id/index.php/ujas/article/view/31