Dewi, Octia, and Endang Retno Winarti. “Students’ Creative Thinking Ability in Solving Problems With Double Loop Problem Solving Model”. Unnes Journal of Mathematics Education 8, no. 2 (September 1, 2019): 111-118. Accessed December 21, 2024. https://journal.unnes.ac.id/sju/ujme/article/view/31718.