Wicaksono, E. N., D. G. Tamtomo, H. Prasetya, and B. Murti. “Multilevel Analysis of Factors Affecting Depression Risk Among the Elderly: Loneliness, Living Status, Physical Activity, Age, Gender, and Education”. Journal of Epidemiology and Public Health, vol. 9, no. 4, Oct. 2024, pp. 515-27, doi:10.26911/jepublichealth.2024.09.04.11.