Collins, Allan, John Seely Brown, and Ann Holum. Cognitive Apprenticeship: Making Thinking Visible. American Educator (Winter 1991): 1-18.
Hege, Brent A. R. “The Role of Emotion in Creating Instructor and Learner Presence in the Distance Education Experience.” Journal of Cognitive Affective Learning (2006). (Note: This article is not available online but a scanned copy is available from Mary Anne Knefel.)
Tu, Chih-Hsiung, and Marina McIsaac. “The Relationship of Social Presence and Interaction in Online Classes.” American Journal of Distance Education 16, no. 3 (January 1, 2002): 131-50. (Note: This article is not available online but a scanned copy is available from Mary Anne Knefel.)
Young, Jeffrey, R. "How to Prepare Professors Who Thought They’d Never Teach Online." The Chronicle of Higher Education online, June 21, 2016.