Kesicioğlu, Oğuz Serdar, and Mehmet Mart. “The Preschool teachers’ Opinion on Teaching Geometry”. Southeast Asia Early Childhood Journal 11, no. 2 (July 4, 2022): 21–36. Accessed April 19, 2024. https://ejournal.upsi.edu.my/index.php/SAECJ/article/view/6551.