Ningsih, Edin, and Sri Rahayuningsih. “Extraction, Isolation, Characterisation and Antioxidant Activity Assay of Catechin Gambir (Uncaria Gambir (Hunter). Roxb”. Al-Kimia 7, no. 2 (December 29, 2019): 177-188. Accessed November 10, 2024. https://journal3.uin-alauddin.ac.id/index.php/al-kimia/article/view/7800.