Sungsri, S., Aimsamang, C., Nilabutra, S., Sungsri, P. and Bunparit, N. (2021) “Development of Learning Promotion Strategy and System for Working Age Population in the 21st Century”, Journal of Humanities and Social Sciences Thonburi University, 15(3), pp. 62–73. available at: https://so03.tci-thaijo.org/index.php/trujournal/article/view/250906 (accessed: 26 August 2026).