SIREGAR, Hesty Marwani; TURMUDI; NURJANAH; DARHIM. Representational Difficulty Across Cognitive Stages in Quadratic Functions: An APOS–Newman Analysis. International Journal of Cognitive Research in Science, Engineering and Education (IJCRSEE), [S. l.], v. 14, n. 2, p. 317–329, 2026. DOI: 10.23947/2334-8496-2026-14-2-317-329. Disponível em: https://ijcrsee.com/index.php/ijcrsee/article/view/3662. Acesso em: 4 sep. 2026.