Junitawati, Junitawati, and Achmad Anwar Abidin. “The Efforts to Improve Mathematics Learning in Material Three-Dimensional Shapes by Use of Concrete Learning Objects”. Panicgogy International Journal 2, no. 1 (March 30, 2024): 22–32. Accessed March 20, 2026. https://demo.aljibra.or.id/index.php/pij/article/view/80.