Nursidrati; Nasruddin; Nurlailah; Muharyati, Y.; Pradita, D. A. R. The Concept of Quadratic Function Graphs Presented in Singaporean Mathematics Textbooks and Its Potential in Developing Critical Thinking Skills. JELMaR 2024, 5 (2), 167-174. https://doi.org/10.37303/jelmar.v5i2.3804.