SERLAHWATY, D., 		SUGIASTUTI, S., & 		NINGRUM, R.
2011 Sep 30.  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. JURNAL ILMU KEFARMASIAN INDONESIA. [Online] 9:2