Endang Listiani Y, Tri Atmaja H, Purwanti E. The Effectiveness of Cooperative Model And Problem Based Learning (Pbl) Assisted By Pop Up Books Media Toward Critical Thinking Skill of Elementary School Students. EM [Internet]. 1Oct.2019 [cited 20May2024];8(2):201-8. Available from: https://journal.unnes.ac.id/sju/eduman/article/view/34330