Marliana, T., Keliat, B., Daulima, N. H. C., & Rahardjo, T. B. W. (2022). A Systematic Review: Factors Related to Happiness and Quality of Life in the Elderly Depression. Open Access Macedonian Journal of Medical Sciences, 9(T5), 1–8. https://doi.org/10.3889/oamjms.2021.7847