Bay, P.V., J. Wain, H. Vinh, N.T. Chinh, S.T. Diep, N.T. Hoa, A. Walsh, C. Parry, V.A. Ho, and N.J. White. “Quantitative Bacteriology of Typhoid Fever in Vietnam”. Medical Journal of Indonesia 7, no. Supp1 (October 1, 1998): 274-6. Accessed April 20, 2024. http://mji.ui.ac.id/journal/index.php/mji/article/view/1136.