SARI, Y. M.; RETNAWATI, H.; FIANGGA, S. The construct validity of mathematical reasoning and proof test instrument integrated with GeoGebra: Second-order confirmatory factor analysis. Beta: Jurnal Tadris Matematika, [S. l.], v. 15, n. 2, p. 104–117, 2022. DOI: 10.20414/betajtm.v15i2.549. Disponível em: https://mail.jurnalbeta.ac.id/index.php/betaJTM/article/view/549. Acesso em: 12 oct. 2025.