JASSEM, Y. M.; KHADER, W. K. Willpower among Middle School Students. Journal of Tikrit University for Humanities, [S. l.], v. 30, n. 9, 2, p. 259–279, 2023. DOI: 10.25130/jtuh.30.9.2.2023.14. Disponível em: https://jtuh.org/index.php/jtuh/article/view/2817. Acesso em: 18 aug. 2026.