Harwood, Debra, and Po-Ling Bork. “Meeting Educators Where They Are: Professional Development to Address Selective Mutism”. Canadian Journal of Education Revue Canadienne De l’éducation, vol. 34, no. 3, Oct. 2011, pp. 136-52, https://journals.sfu.ca/cje/index.php/cje-rce/article/view/856.