NURSIDRATI; NASRUDDIN; NURLAILAH; MUHARYATI, Yully; PRADITA, Diyah Ayu Rizki. The Concept of Quadratic Function Graphs Presented in Singaporean Mathematics Textbooks and Its Potential in Developing Critical Thinking Skills. Journal of Education and Learning Mathematics Research (JELMaR), [S. l.], v. 5, n. 2, p. 167–174, 2024. DOI: 10.37303/jelmar.v5i2.3804. Disponível em: https://jelmar.wisnuwardhana.ac.id/index.php/jelmar/article/view/184. Acesso em: 25 aug. 2026.