Barker, Jennifer, Ken Jeffery, Rajiv Sunil Jhangiani, and George Veletsianos. “Eight Patterns of Open Textbook Adoption in British Columbia”. The International Review of Research in Open and Distributed Learning 19, no. 3 (July 11, 2018). Accessed July 18, 2024. https://www.irrodl.org/index.php/irrodl/article/view/3723.