Gracia, D. R., and E. R. Rubetta. “Literature Review: Quarantine and Lockdown During Covid19 Outbreak Impact on Mental Health Problem”. JURNAL KESEHATAN LINGKUNGAN, vol. 12, no. 1si, Sept. 2020, pp. 29-37, doi:10.20473/jkl.v12i1si.2020.29-37.