HETT , Geoffrey G. Two Types of Behavior Management Programs and Their Effects upon Student Achievement. Canadian Journal of Education/Revue canadienne de l’éducation, [S. l.], v. 6, n. 1, p. 32–41, 1981. Disponível em: https://cje.journals.publicknowledgeproject.org/index.php/cje-rce/article/view/8091. Acesso em: 19 sep. 2026.