Tobing, J.H., Ricky, D.R. and Sari, D.N. 2016. THE ANTIOXIDANT ACTIVITY OF THE EXTRACT OF AFRICAN LEAVES (VERNONIA AMYGDALINA) USING 1,1-DIPHENYL-2- PICRYLHYDRAZYL (DPPH) METHOD. 11th International Scholars Conference. 4, 1 (Oct. 2016), 74. DOI:https://doi.org/10.35974/isc.v4i1.1845.