Nasution, H. and Nst, M. R. (2015) “Test for diphenilphikril hydrazyl (DPPH) free antiradical from acetate etil extract of nangka leaf (Artocarpus heterophyllus Lamk)”, Jurnal Sains Dasar, 3(2). doi: 10.21831/jsd.v3i2.4111.