พระนาค ส. A Study of Problems of Internal Quality Assurance Operations under the office of the Non-Formal and Informal Education Uthaithani Province. Education journal Faculty of Education, Nakhon Sawan Rajabhat University , Nakhon Sawan,Thailand, v. 4, n. 3, p. 13–22, 2021. Disponível em: https://so02.tci-thaijo.org/index.php/edunsrujo/article/view/250227. Acesso em: 6 may. 2024.