SERLAHWATY, DIANA, 		SUGIASTUTI, SETYORINI, AND 		NINGRUM, RIZKA.
" Antioxidant Activity of Water and Ethanol Extract of Green Betle Leaf (Piper betle L.) and Red Betle Leaf (Piper cf. fragile Benth.) using DPPH Free Radical Inhibiton Method" <em>JURNAL ILMU KEFARMASIAN INDONESIA</em> [Online], Volume 9 Number 2 (30 September 2011)