Uliana, et al. “Improving Mathematical Problem-Solving Skills through the Problem-Based Learning Model on Financial Literacy Material”. Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton, vol. 11, no. 4, Oct. 2025, pp. 1062-73, http://www.jurnal-umbuton.ac.id/index.php/Pencerah/article/view/7312.