[1]
P. Y. Hasibuan, A. S. Daulay, R. Ridwanto, and A. F. Pulungan, “Determination of Tannin Content in Mangkokan Leaves (Polyscias scutellaria (Burm.f.) Fosberg) and Guava Leaves (Psidium guajava L.) Using UV-Vis Spectrophotometry”, JPS, vol. 8, no. 4, pp. 3048–3057, Dec. 2025.