Nurmayni, and Fitriani Pramita Gurning. “Faktor Yang Mempengaruhi Implementasi Program Vaksinasi Covid-19 Di Kabupaten Labuhanbatu Selatan”. Tropical Public Health Journal 2, no. 2 (September 30, 2022): 107-111. Accessed November 28, 2024. https://talenta.usu.ac.id/trophico/article/view/10135.