Nizeyumukiza, E., A. C. Pierewan, E. Ndayambaje, and Y. Ayriza. “Social Capital and Mental Health Among Older Adults in Indonesia: A Multilevel Approach”. Journal of Population and Social Studies [JPSS], Vol. 29, no. -, Sept. 2020, pp. 1 - 14, https://so03.tci-thaijo.org/index.php/jpss/article/view/237433.