Sari, Dewi, Eva Banowati, and Eko Purwanti. “The Effect of Problem-Based Learning Model Increase The Creative Thinking Skill and Students Activities on Elementary School”. Journal of Primary Education 7, no. 1 (March 6, 2018): 57-63. Accessed April 8, 2025. http://journal.unnes.ac.id/sju/jpe/article/view/21861.