Nuari, Nian Afrian, Dhina Widayati, Efa Nur Aini, and Sony Susanto. “Pemberdayaan Lansia Dalam Upaya Program Vaksinasi Covid-19 Dengan Edukasi Herd Immunity”. Jurnal SOLMA 11, no. 1 (April 30, 2022): 39–44. Accessed July 16, 2024. https://journal.uhamka.ac.id/index.php/solma/article/view/8378.