Murat DURAN, Furkan ÖZDEMİR, Abdullah KAPLAN. “A Research on the Use of Problem Based Learning Approach: Teaching of Probability Sample”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 6, no. 2, Sept. 2015, pp. 250-84, https://turcomat.org/index.php/turkbilmat/article/view/88.