HUSSIN, A.; RICHARD, D.; H.H, M.; S, G. The Physical Geography and Geology of Northeast Langkawi. Malaysian Journal of Science, [S. l.], v. 24, p. 1–8, 2005. Disponível em: https://ejournal.um.edu.my/index.php/MJS/article/view/8811. Acesso em: 13 may. 2024.