เมืองโคตร ป.; บุญประจักษ์ เ.; สุภวาลย์ พ. Effects of Learning Activities by using Problem-based Learning (PBL) Approach in One Variable - Linear Equation for Matthayomsuksa 2. Journal of Industrial Education, [S. l.], v. 14, n. 2, p. 568–575, 2015. Disponível em: https://ph01.tci-thaijo.org/index.php/JIE/article/view/122527. Acesso em: 1 may. 2024.