Susilawati, Samsul, and Triyo Supriyatno. “Problem-Based Learning Model in Improving Critical Thinking Ability of Elementary School Students”. Advances in Mobile Learning Educational Research 3, no. 1 (February 13, 2023): 638-647. Accessed May 5, 2024. https://www.syncsci.com/journal/AMLER/article/view/AMLER.2023.01.013.