Kadarsono, M., H. Suyitno, and S. Waluya. “The Mathematical Critical Thinking Ability of Students in CTL Learning Based on Cognitive Style”. Unnes Journal of Mathematics Education Research, Vol. 8, no. 1, Dec. 2018, pp. 89-95, https://journal.unnes.ac.id/sju/ujmer/article/view/24585.