PALATIP, P.; KEERATICHAMROEN, W. A Study of Learning Achievement on Law and Politics for Life Learning Unit and Critical Thinking Ability of Grade 8 Students Using Problem Based Learning with Concept Mapping. Ratchaphruek Journal, [S. l.], v. 18, n. 2, p. 74–81, 2020. Disponível em: https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/220236. Acesso em: 26 aug. 2026.