Harahap, Ilhamdsyah, Oktavia Dewi, and Mitra Mitra. “The Incomplete Basic Immunization for Infants During the Covid-19 Pandemic in the Work Area of the Bandar Petalangan Health Center, Pelalawan Regency”. Jurnal kesehatan komunitas (Journal of community health) 9, no. 1 (July 25, 2023): 198–202. Accessed November 22, 2024. https://jurnal.htp.ac.id/index.php/keskom/article/view/923.