“Phytochemical Test and Value Determination Sun Protection Factor (SPF) Ethanol Extract Waru Leaves (Hibiscus Tiliaceus)”. Stannum : Jurnal Sains Dan Terapan Kimia, vol. 5, no. 1, Apr. 2023, pp. 24-29, https://doi.org/10.33019/jstk.v5i1.3785.