Marzuki, M.; Janis, I.; Harahap, N.; Rahendra, M. F.; Pangestuti, D. .; Susanti, M.; Lubis, S. A. Legal Effectiveness in Handling Covid-19 in Batu Bara Regency North Sumatra Province. International J. Soc. n.a. and Law 2021, 2, 47 - 53.