Siahaan, Meri Fuji, and Yubali Ani. “Kelas Sosial Dan Pembelajaran Matematika”. Jurnal Ilmiah Sekolah Dasar 3, no. 1 (March 26, 2019): 63–70. Accessed December 22, 2024. https://ejournal.undiksha.ac.id/index.php/JISD/article/view/17182.