CALP, Şükran. Peaceful and Happy Schools: How to Build Positive Learning Environments?. International Electronic Journal of Elementary Education, [S. l.], v. 12, n. 4, p. 311–320, 2020. Disponível em: https://iejee.com/index.php/IEJEE/article/view/1073. Acesso em: 27 oct. 2021.