Amalia, R., Cahya, E. and Priatna, B. (2018) “Improving student’s mathematical critical thinking skills through K-N-W-S strategy”, International Conference on Mathematics and Science Education of Universitas Pendidikan Indonesia, 3, pp. 353-356. Available at: http://science.conference.upi.edu/proceeding/index.php/ICMScE/article/view/179 (Accessed: 20February2020).