Jaafar F, Mohd, A.Hamid A. Hadi, Ismail N.H, and Khalijah Awang. 2005. “Indole Alkaloids of Leuconotis Eugenifolius”. Malaysian Journal of Science 24 (1):129-31. https://malindojournal.um.edu.my/index.php/MJS/article/view/8945.