Erna Puji Astuti, Minnah El Widdah, and Heroza Firdaus. “Development of 4D Model-Based Mathematics Teaching Materials on Geometry to Improve Learning Outcomes of Islamic Elementary School (MI) Students”. al-Afkar, Journal For Islamic Studies 9, no. 3 (August 4, 2026): 1549–1556. Accessed August 4, 2026. https://mail.al-afkar.com/index.php/Afkar_Journal/article/view/3579.