AKBAYIR, Kamil, ve Aykan AKÇA. “AN INVESTIGATION ON HOW MUCH THE SECONDARY SCHOOL STUDENTS LEARN THE PLACE VALUE CONCEPT IN NATURAL NUMBERS”. International Journal of Social and Humanities Sciences Research (JSHSR) 4, no. 15 (Aralık 31, 2017): 2149–2158. Erişim Haziran 30, 2024. https://jshsr.org/index.php/pub/article/view/2270.