Maulidha, N., Fridayanti, A., & Masruhim, M. A. (2015). Uji Aktivitas Antioksidan Ekstrak Daun Sirih Hitam (Piper sp.) terhadap DPPH (1,1-diphenyl-2-picryl hydrazyl). Jurnal Sains Dan Kesehatan, 1(1), 16–20. https://doi.org/10.25026/jsk.v1i1.10