Lee, M.C. “Pulau Perambut, an Islet of Goethite off Kedah, and Its Signficance”.
Malaysian Journal of Science
18, no. 1 (April 29, 1999): 41–46. Accessed June 13, 2025. https://mojes.um.edu.my/index.php/MJS/article/view/9383.