“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”. International Journal of Scientific Research and Management (IJSRM) 6, no. 01 (January 12, 2018): M–2018. Accessed November 23, 2024. https://ijsrm.net/index.php/ijsrm/article/view/1231.