Harinder Rai, S., and H. Amy Then Yee. “A Preliminary Study of the Macrofauna of Sandy Shore and Mangrove Forest of the North East Coast of Langkawi”. Malaysian Journal of Science, vol. 24, Apr. 2005, pp. 133-8, https://samudera.um.edu.my/index.php/MJS/article/view/8835.