Tampubolon, E. A., and R. A. Bakara. “Relationship Level Of Knowledge Of Mother With Giving Immunization In Infants 0-12 Months At The Mompang Health Center Jae, Panyabungan Utara Kabupaten Mandailing Natal In 2022”. Jurnal EduHealth, vol. 14, no. 01, Feb. 2023, pp. 347-50, https://ejournal.seaninstitute.or.id/index.php/healt/article/view/1590.