BOONNAN, R. Development of a Positive Psychology-Based Program to Promote Self-Directed Learning for Grade 8 Students. Chophayom Journal, [S. l.], v. 37, n. 2, p. 89–104, 2026. Disponível em: https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/289818. Acesso em: 2 sep. 2026.