W.C, Ling, Ahmad F, and Mat Ali R. “Luteolin and 4-Hydroxybenzoic Acid from the Leaves of Vitex Negundo L”. Malaysian Journal of Science 24, no. 1 (January 31, 2005): 133–135. Accessed May 18, 2024. http://mjs.um.edu.my/index.php/MJS/article/view/8946.