Yupeni, Erna, Susilawati Susilawati, and Dedi Futra. “Development of PBL-Based Student Worksheets to Improve Problem-Solving Skills and Collaborative Skills of 11th Grade Students in Reaction Rate Material”. AL-ISHLAH: Jurnal Pendidikan 17, no. 1 (March 24, 2025): 1424–1439. Accessed November 3, 2026. https://www.journal.staihubbulwathan.id/alishlah/article/view/6234.