Auliannisa, R., G. Jenny, and H. Djohan. “Phytochemical Identification and Antioxidant Activity Test of Acetone Extract of Celery Leaves (Apium Graveolens L.) Using the DPPH (2,2-Diphenyl-1-Picrylhydrazyl) Method”. MEDICA (International Medical Scientific Journal), vol. 6, no. 3, Oct. 2024, pp. 107–114, doi:10.53770/medica.v6i3.488.