Hussin, Azhar, Azman Abdul Ghani, Khaira Ismail, Rosmadi Fauzi, Richard Dorall, and S. Gokilan. “The Geology and Geomorphology of Pulau Jarak, Pulau Sembilan and Pulau Perak”. Malaysian Journal of Science 27, no. 3 (December 26, 2008): 1–6. Accessed May 7, 2024. https://mjs.um.edu.my/index.php/MJS/article/view/7702.