Rifiyani, et al. “Analysis of Eighth-Grade Students’ Critical and Creative Thinking Skills In Solving Open-Ended Mathematics Problems”. Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton, vol. 11, no. 4, Oct. 2025, pp. 1049-61, http://www.jurnal-umbuton.ac.id/index.php/Pencerah/article/view/7313.