Ismoedijanto, Ismoedijanto. “Diphtheria Di Jawa Timur”. Medica Hospitalia : Journal of Clinical Medicine 2, no. 2 (October 2, 2014). Accessed May 4, 2024. http://medicahospitalia.rskariadi.co.id/medicahospitalia/index.php/mh/article/view/95.