SUPRAPTO, Edy; SETYANSAH, Reza Kusuma; DEVINA, Dea. GeoGebra Application Based Tutorial Materials to Improve Spatial Mathematics Abilities in Vocational High Schools. Jurnal Pendidikan Teknologi dan Kejuruan, [S. l.], v. 27, n. 2, p. 175–181, 2021. DOI: 10.21831/jptk.v27i2.39099. Disponível em: https://jurnal.uny.ac.id/index.php/jptk/article/view/39099. Acesso em: 15 may. 2025.