Ariani, M. “Determinants of Elderly Behavior Follow the Posyandu in the Working Area of Kebonsari Primary Healthcare Surabaya”. Jurnal Promkes: The Indonesian Journal of Health Promotion and Health Education, vol. 8, no. 1, May 2020, pp. 79-86, doi:10.20473/jpk.V8.I1.2020.79-86.