Rintani, Aderia, Tita Mintarsih, Yosef Muhammad RBM, Juli Sapitri Siregar, and Adhy Prasetyo Widodo. “Risk Factors Associated to Diphtheria Outbreak In Developing Countries”. Jurnal Ilmu Kesehatan Masyarakat 9, no. 2 (October 10, 2018): 83–95. Accessed February 7, 2025. https://ejournal.fkm.unsri.ac.id/index.php/jikm/article/view/249.