Syam, Nur Sakhra, et al. “Efektivitas Model Problem Based Learning (PBL) Berbasis Bimbingan Belajar Pada Pembelajaran Matematika Siswa Sd Inpres Maccini Sombala”. Educatio, vol. 18, no. 2, Dec. 2023, pp. 336-47, doi:10.29408/edc.v18i2.24070.