Jumiati, Lutviana Wahyu Febriyanti, and Irega Gelly Gera. “Analisis Kesulitan Mata Pelajaran Matematika SD Pada Materi Bangun Datar Sudut Pandang Jerome Brunner”. Journal of Global Research Education 1, no. 1 (January 24, 2024): 75–83. Accessed February 15, 2025. https://journal.aaipadang.com/jgre/article/view/28.