J. P. Sinurat, R. M. B. Karo, and R. Berutu, “Determination of Total Flavonoid Content of Saputangan Leaves (Maniltoa grandiflora (A. Gray) Scheff) and Its Ability as Antioxidant”, J. Sains. Kes, vol. 4, no. 3, pp. 275–279, Nov. 2024, Accessed: May 12, 2026. [Online]. Available: http://jsk.ff.unmul.ac.id/index.php/JSK/article/view/553