Yong, Hoi Sen, Rosli Hashim, Mohd Sofian Azirun, and Siti Zaleha Mat Diah. “ Peninsular Malaysia”. Malaysian Journal of Science 29 (February 26, 2010): 63–66. Accessed April 4, 2025. https://mjs.um.edu.my/index.php/MJS/article/view/7321.