Sumarni, Sumarni, and Alberth Supriyanto Manurung. “Upaya Peningkatan Hasil Belajar Matematika Melalui Penerapan Model Project Based Learning Pada Materi Bangun Ruang”. Jurnal Basicedu, vol. 7, no. 5, Sept. 2023, pp. 2862-71, doi:10.31004/basicedu.v7i5.5923.