amorngul, natchapat (2021) “Instilling Values that Characterize Students of King Prajadhipok’s Institute”, King Prajadhipok’s Institute Journal, 18(3), pp. 144–158. available at: https://so06.tci-thaijo.org/index.php/kpi_journal/article/view/246838 (accessed: 12 October 2026).