[1]
Miftiani, S.W., Rochmad, R. and Kharis, M. 2020. Developing Problem Based Learning supplemental materials to increase 7th graders higher-order thinking skills. Unnes Journal of Mathematics Education. 9, 2 (Aug. 2020), 121-128. DOI:https://doi.org/10.15294/ujme.v9i2.40543.