Total Phenolic, Total Flavonoid, Quercetin Content and Antioxidant Activity of Standardized Extract of Moringa oleifera Leaf from Regions with Different Elevation, Sulastri, Evi, Zubair Muhammad Sulaiman, Anas Nurafni Israyanti, Abidin Syakila, Hardani Ririen, Yulianti Risfah, and , Pharmacognosy Journal, November 2018, Volume 10, Issue 6s, p.s104-s108, (2018)