Gusliani E, Ediputra K, Fadhilaturrahmi F. Efforts to Increase Student’s Critical Thinking Ability Using Problem Based Learning Model for Elementary School Students. edumaspul [Internet]. 1Oct.2021 [cited 7May2024];5(2):160-5. Available from: https://ummaspul.e-journal.id/maspuljr/article/view/2015