SUMANTRI, Mohamad Syarif; SATRIANI, Retni. The effect of formative testing and self-directed learning on mathematics learning outcomes. International Electronic Journal of Elementary Education, [S. l.], v. 8, n. 3, p. 507–524, 2017. Disponível em: https://www.iejee.com/index.php/IEJEE/article/view/128. Acesso em: 4 aug. 2026.