Gusliani, E., Ediputra, K., & Fadhilaturrahmi, F. (2021). Efforts to Increase Student’s Critical Thinking Ability Using Problem Based Learning Model for Elementary School Students. Edumaspul: Jurnal Pendidikan, 5(2), 160-165. https://doi.org/10.33487/edumaspul.v5i2.2015