Swastika, Sobma, Setyo Sri Rahardjo, and RB Soemanto. 2017. “Biopsychosocial Determinants of Quality of Life in the Elderly at Tresna Werdha Social Nursing Home, Yogyakarta”. Journal of Epidemiology and Public Health 2 (1):82-92. https://jepublichealth.com/index.php/jepublichealth/article/view/36.