SIREGAR, E. I.; HAYATI, N. A.; FADILA, N.; PRATAMA, A.; YUDHA, Y. H. Think Future, Act Present: Looking Beyond the Closed Door. Sukma: Jurnal Pendidikan, [S. l.], v. 1, n. 1, p. 19–55, 2017. DOI: 10.32533/01102.2017. Disponível em: https://jurnalsukma.org/index.php/sukma/article/view/01102.2017. Acesso em: 10 jan. 2025.