Masyita , Masyita, et al. “Flavonoid Compounds of the Catechin from Wungu (Graptophyllum Pictum (L.) Griff) Leaves and the Sun Protecting Factor Value”. Jurnal Akademika Kimia, vol. 11, no. 1, Feb. 2022, pp. 31-38, doi:10.22487/j24775185.2022.v11.i1.pp31-38.