Lee, M.C. “Pulau Perambut, an Islet of Goethite off Kedah, and Its Signficance”. Malaysian Journal of Science (MJS) 18, no. 1 (April 29, 1999): 41–46. Accessed February 28, 2026. https://jml.um.edu.my/index.php/MJS/article/view/9383.