Aini, Z., E. P. Pamungkasari, and A. N. Probandari. “Epidemiological Investigation in Diphtheria Control in Banda Aceh, Indonesia”. Journal of Epidemiology and Public Health, vol. 5, no. 2, Apr. 2020, pp. 141-9, https://jepublichealth.com/index.php/jepublichealth/article/view/258.