Safira, Amalia, and Bambang Susilo. “The Development of Mathematical Worksheet Based on Surrounding Environment With Problem Based Learning Model to Improve Creative Thinking Ability”. Unnes Journal of Mathematics Education 11, no. 1 (March 31, 2022): 31-41. Accessed December 21, 2024. https://journal.unnes.ac.id/sju/ujme/article/view/55848.