Qurniyawati, Eny, Asma Azzahra, Izzah Nur Shabrina, and Fifta Hayu Ananda. “Relationship Between Immunization Coverage and Diphtheria Incidence in East Java 2023”. Media Gizi Kesmas 13, no. 2 (December 12, 2024): 608–613. Accessed January 12, 2025. https://e-journal.unair.ac.id/MGK/article/view/55740.