Suksri, C., Phongkhieo, N. T. and Emphandhu, D. (2021) “Environmental perception and learning experience in nature trail of national park visitors”, Kasetsart Journal of Social Sciences, 42(2), pp. 339–244. available at: https://so04.tci-thaijo.org/index.php/kjss/article/view/251213 (accessed: 14 September 2026).