İsmail GÜZEL, İlhan KARATAŞ, Bülent ÇETİNKAYA. 2013. “A Comparison of Secondary School Mathematics Curriculum Guidebooks: Turkey, Germany and Canada”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 1 (3):309-25. https://turcomat.org/index.php/turkbilmat/article/view/20.