STIAWAN, D.; DZAKIROH, A. Pengembangan Kognitif Bentuk Geometri pada Anak. ABNA : Journal of Islamic Early Childhood Education, [S. l.], v. 2, n. 1, 2021. DOI: 10.22515/abna.v2i1.3765. Disponível em: https://ejournal.uinsaid.ac.id/index.php/abna/article/view/3765. Acesso em: 11 may. 2024.