Andi Tenri Ugi Dg. Pine, Haeria, Hermawati,. " Penentuan Kadar Flavonoid Total dan Aktivitas Antioksidan Ekstrak Etanol Daun Bidara (Ziziphus spina-christi L.)" Journal of Pharmaceutical and Medicinal Sciences [Online], Volume 1 Number 2 (5 March 2017)