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 November 20, 2024. https://samudera.um.edu.my/index.php/MJS/article/view/9383.