Hasanah, Siti Noor, et al. “Optimization of Basic Immunization Coverage at Paku Alam: Optimalisasi Cakupan Imunisasi Dasar Di Paku Alam”. Health Sciences International Journal, vol. 2, no. 2, Aug. 2024, pp. 191-7, https://hsij.anandafound.com/journal/article/view/45.