Siregar, L., T. R. Sinaga, and A. Purba. “PENINGKATAN KAPASITAS RELAWAN TERKAIT PENCEGAHAN COVID-19”. Jurnal Abdimas Mutiara, vol. 2, no. 1, Mar. 2021, pp. 1-6, https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/1793.