Sari, Indah Wulan, et al. “Pengaruh Model Problem Based Learning Terhadap Kemampuan Berpikir Kreatif Matematis Berdasarkan Self Esteem Peserta Didik”. Jurnal Pendidikan Matematika RAFA, vol. 8, no. 2, Dec. 2022, pp. 168-7, https://doi.org/10.19109/jpmrafa.v8i2.13405.