Schonewille, Jack, Jack Martin, and Philip H. Winne. 1978. “A Comparison of Punishment and Positive Reinforcement Group Contingencies in the Modification of Inappropriate Classroom Behaviors”. Canadian Journal of Education Revue Canadienne De l’éducation 3 (3):21-36. https://cje.journals.publicknowledgeproject.org/index.php/cje-rce/article/view/8018.