Ardani, Raden Ajeng Savira, and Lola Pinto Amaral. β€œIs Problem Based Learning Assisted by Pop Up Book Effective in Improving Problem Solving Ability and Attitude of Curiosity?”. Elementary Education Journal 1, no. 2 (June 30, 2022): 104–111. Accessed June 14, 2025. https://journal.nurscienceinstitute.id/index.php/eej/article/view/244.