Isworo, Adi, Pramono Giri Kiswoyo, and Suharsono. “Cold Chain Evaluation of the Immunization Program in Primary Health Centers in 2022”. Berita Kedokteran Masyarakat 40, no. 01 (January 31, 2024): e7841. Accessed January 18, 2026. https://jurnal.ugm.ac.id/v3/BKM/article/view/7841.