เถาว์โท อ.; สราวุธ จ. The Development of Learning Achievement in Topic of Solving Polynomial Fractional of Ninth Grade Students by using Problem-Based Learning Approach. Journal of Graduate School, Pitchayatat, Ubon Ratchathani Rajabhat University, [S. l.], v. 13, n. 2, p. 245–254, 2018. Disponível em: https://so02.tci-thaijo.org/index.php/Pitchayatat/article/view/221666. Acesso em: 19 may. 2024.