DAMANIK, E.; SIMANJUNTAK, Y. T.; WIRATMA, D. Y. PENCEGAHAN CORONA VIRUS DISEASE 19 (COVID-19) PADA PEDAGANG PASAR HELVETIA KELURAHAN HELVETIA TENGAH. Jurnal Abdimas Mutiara, [S. l.], v. 1, n. 2, p. 8–11, 2020. Disponível em: https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/1323. Acesso em: 29 jan. 2026.