Bella B, Pangaribuan SM, Widiastuti SH. Stress and Sleep Quality among the Elderly During The COVID-19 Pandemic: A cross-sectional study. bik [Internet]. 2023 Feb. 1 [cited 2024 Nov. 23];16(1):11-2. Available from: https://journals2.ums.ac.id/bik/article/view/1260