Safian, Nazarudin, Shamsul A. Shah, Shaharudin Idrus, and Wan M. Hamzah. “Cluster Analysis of Typhoid Cases in Kota Bharu, Kelantan, Malaysia”. Medical Journal of Indonesia 17, no. 3 (August 1, 2008): 175-82. Accessed July 3, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/319.