Angraeni, Lina, and Agus Abadi. “Mean Learning With Problem Based Learning to Improve Problem Solving Ability of Junior High School Students”. International Journal Of Mathematics And Computer Research 13, no. 7 (July 29, 2025): 5480-5486. Accessed May 19, 2026. https://www.ijmcr.everant.org/index.php/ijmcr/article/view/1007.