Sari, C. K., Dwiyani, E., Machromah, I. U., Toyib, M. and Sari, D. N. V. (2022) “Enhancing Students’ Critical Thinking by Integrating Contextual Problems Worksheets on Problem Based Learning”, Journal of Education Action Research, 6(1), pp. 109–115. doi: 10.23887/jear.v6i1.43392.