The Analysis of Critical Thinking Skill of Version P21 in Solving the Problems of Two Dimensional Arithmetic Derived from the Implementation of Guided Discovery Learning. int.jour.sci.res.mana [Internet]. 2018 Jan. 12 [cited 2024 Nov. 23];6(01):M-2018. Available from: https://ijsrm.net/index.php/ijsrm/article/view/1231