Putri, M. R., N. J. P. Simanjuntak, and N. B. Sembiring. “Antioxidant Activity Test of Patchouli Leaf Ethanol Extract Lotion (Pogostemon Cablin Benth) Using The DPPH (2,2-Diphenyl-1-Picrylhydrazil) Method”. Journal of Pharmaceutical and Sciences, vol. 9, no. 2, June 2026, pp. 1725-34, doi:10.36490/journal-jps.com.v9i2.1350.