พรมตรุษ อ.; ปุ่มสันเทียะ อ. Misconceptions and Mistakes in Mathematics on Inequality of Ninth Grade Students. Journal of Education Studies, Bangkok, Thailand, v. 47, n. 4, p. 539–561, 2019. Disponível em: https://so02.tci-thaijo.org/index.php/EDUCU/article/view/232138. Acesso em: 20 may. 2024.