AL-MAYTTAH, M. . . The level of positive thinking among the first secondary graders / Science Branch. Tishreen University Journal- Arts and Humanities Sciences Series, [S. l.], v. 41, n. 5, 2019. Disponível em: https://journal.tishreen.edu.sy/index.php/humlitr/article/view/9067. Acesso em: 3 may. 2024.