LUSYANA, E.; SETYANINGRUM, W. van Hiele instructional package for vocational school students’ spatial reasoning. Beta: Jurnal Tadris Matematika, [S. l.], v. 11, n. 1, p. 79–100, 2018. DOI: 10.20414/betajtm.v11i1.146. Disponível em: http://jurnalbeta.ac.id/index.php/betaJTM/article/view/146. Acesso em: 1 jul. 2026.