ปัญญาวงค์ จ. . (2022) “The Study of the Operational Problems of Subdistrict Non - Formal and Informal Education Centers in Lampoon under Office of the Non - Formal and Informal Education”, Education journal Faculty of Education, Nakhon Sawan Rajabhat University . Nakhon Sawan,Thailand, 3(3), pp. 35–44. available at: https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/254275 (accessed: 14 April 2025).