Fauzi, R., A. Hussin, A. A. Ghani, and K. Ismail. “Making the Most of Maps: GIS and Topographical Survey on the Island of Jarak”. Malaysian Journal of Science, vol. 27, no. 3, Dec. 2008, pp. 13-17, http://mojes.um.edu.my/index.php/MJS/article/view/7704.