“PENETAPAN KADAR VITAMIN C DAN UJI AKTIFITAS ANTIOKSIDAN SARI BUAH SONGI (Dillenia serrata Thunb.) TERHADAP RADIKAL DPPH (DIPHENYLPICRYLHYDRAZYL)”, PHARMACON, vol. 6, no. 2, May 2017, doi: 10.35799/pha.6.2017.16419.