Onder, Alev, Asude Balaban Dagal, Gulsen Ilci Kusmus, H.Sumeyra Bilici, Hamdi Ozdemir, and Zeynep Kaya Deger. “An Investigation of Visual Perception Levels of Pre-School Children in Terms of Different Variables”. International Online Journal of Education and Teaching 6, no. 1 (January 5, 2019): 190–203. Accessed January 8, 2026. https://iojet.org/index.php/IOJET/article/view/384.