IBRAHIM KHALIL, A. Essence - Appearance and it’s Relation with Self -efficacy and Scholastic Achievement for Preparatory School Students. College of Basic Education Research Journal, [S. l.], v. 11, n. 4, p. 30–62, 2012. Disponível em: https://stats.uomosul.edu.iq/index.php/berj/article/view/39108. Acesso em: 26 oct. 2025.