MARASIGAN, A. C. .; ESPINOSA, A. A. . Modified Useful-Learning Approach: Effects on Students‘ Critical Thinking Skills and Attitude towards Chemistry. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 1, n. 1, p. 35–72, 2014. Disponível em: http://ijlter.net/index.php/ijlter/article/view/1221. Acesso em: 2 jan. 2026.