Herlawan, H., D. Lestari, and Y. Yusman. “Increasing The Mathematics Learning Achievement of Class XII Students Through Project Based Learning (PjBL) Based on Character Education ”. Jurnal Akademik Pendidikan Matematika, vol. 9, no. 2, Nov. 2023, pp. 89-94, doi:10.55340/japm.v9i2.1359.