Lapkin , Sharon, Christine M. Andrew, Birgit Harley, Merrill Swain, and Jill Kamin. 1981. “The Immersion Centre and the Dual-Track School: A Study of the Relationship Between School Environment and Achievement in a French Immersion Program”. Canadian Journal of Education Revue Canadienne De l’éducation 6 (3):68-90. https://cje.journals.publicknowledgeproject.org/cje/index.php/cje-rce/article/view/8110.