Harahap, Mawaddah, Leonardo Kusuma, Melva Suryani, Candra Ebenezer Situmeang, and Juniven Francisco Purba. “Identification of Face Mask With YOLOv4 Based on Outdoor Video”. Sinkron : jurnal dan penelitian teknik informatika 5, no. 2B (October 19, 2021): 127-134. Accessed July 27, 2024. https://jurnal.polgan.ac.id/index.php/sinkron/article/view/11190.