Silalahi, Veronica. “PENGETAHUAN DAN PERILAKU PENCEGAHAN COVID-19”. JPK : Jurnal Penelitian Kesehatan 12, no. 2 (December 27, 2022): 46–55. Accessed September 19, 2024. https://journal.stikvinc.ac.id/index.php/jpk/article/view/231.