SLEEP QUALITY INDEX COMPARISON BETWEEN URBAN AND RURAL POPULATION IN NORTH SUMATERA. Al Insyirah International Scientific Conference on Health, [S. l.], v. 2, n. 1, p. 201–211, 2021. Disponível em: https://jurnal.ikta.ac.id/aisch/article/view/1560. Acesso em: 22 jul. 2026.