Puttummavong, N., T. Junprasert, and K. Pattrawiwat. “Ageism towards Older Parents: A Case Study of Young Adults in Thai Family”. Journal of Behavioral Science for Development, vol. 13, no. 1, Jan. 2021, pp. 1-24, https://so02.tci-thaijo.org/index.php/JBSD/article/view/242951.