Davis, N., Roblyer, M., Charania, A., Ferdig, R., Harms, C., Compton, L., & Cho, M. (2007). Illustrating the "Virtual" in Virtual Schooling: Challenges and Strategies for Creating Real Tools to Prepare Virtual Teachers. Internet and Higher Education. https://doi.org/10.1016/j.iheduc.2006.11.001
Davis, Niki, M. Roblyer, Amina Charania, Richard Ferdig, Chad Harms, Lily Compton, and Mi Cho. 2007. “Illustrating the ‘Virtual’ in Virtual Schooling: Challenges and Strategies for Creating Real Tools to Prepare Virtual Teachers”. Internet and Higher Education. https://doi.org/10.1016/j.iheduc.2006.11.001.
Davis, N., M. Roblyer, A. Charania, R. Ferdig, C. Harms, L. Compton, and M. Cho. Illustrating the "Virtual" in Virtual Schooling: Challenges and Strategies for Creating Real Tools to Prepare Virtual Teachers. Internet and Higher Education, 1 Jan. 2007, doi:10.1016/j.iheduc.2006.11.001.