Rahmah, R., R. Rahayu, R. Ridwanto, and A. S. Daulay. “Phytochemical Screening and Antioxidant Activity Testing of Avocado Leaf Ethanol Extract (Persea Americana Mill.) Using the DPPH Method”. Journal of Pharmaceutical and Sciences, vol. 6, no. 5-si, Dec. 2023, pp. 9-25, doi:10.36490/journal-jps.com.v6i5-si.369.