YUWONO, M. R.; SYAIFUDDIN, M. W. Pengembangan problem based learning dengan assessment for learning berbantuan smartphone dalam pembelajaran matematika. Beta: Jurnal Tadris Matematika, [S. l.], v. 10, n. 2, p. 184–202, 2017. DOI: 10.20414/betajtm.v10i2.116. Disponível em: https://jurnalbeta.ac.id/index.php/betaJTM/article/view/116. Acesso em: 25 sep. 2021.