Thomas, N. et al. 2026. Formulation and Antioxidant Activity Test of Emulgel Extract of Guava (Psidium Guajava Linn.) Using DPPH (2,2-Diphenyl-1- Picrylhydrazyl) Methods . Jurnal Farmasi Teknologi Sediaan dan Kosmetika. 3, 1 (Mar. 2026), 53–67. DOI:https://doi.org/10.70075/jftsk.v3i1.291.