Sirajuddin, Sirajuddin, et al. “Visualizing Fractions: Enhancing Problem-Solving Performance Through Diagrammatic Reasoning in Elementary Mathematics”. Jurnal Penelitian Dan Pengkajian Ilmu Pendidikan: E-Saintika, vol. 9, no. 2, July 2025, pp. 512-24, https://doi.org/10.36312/e-saintika.v9i2.3139.