Tamba, Darwin, Pretty Pretty L. Tampubolon, & Herna Anzly Saragih. " PERSEPSI MASYARAKAT TENTANG VAKSINASI COVID-19 DI KELURAHAN PULO BRAYAN MEDAN." JURNAL DARMA AGUNG HUSADA [Online], 10.1 (2023): 1 - 7. Web. 21 Nov. 2024