SANTOSA, R. G.; TAMPUBOLON, J. K. Pelatihan Cara Berpikir Simbolik-Matematik di SMA BOPKRI 2 Yogyakarta. International Journal of Community Service Learning, [S. l.], v. 4, n. 1, p. 35–43, 2020. DOI: 10.23887/ijcsl.v4i1.23099. Disponível em: https://ejournal.undiksha.ac.id/index.php/IJCSL/article/view/23099. Acesso em: 17 jul. 2024.