5Leah A. Sutton (2001), The Principle of Vicarious Interaction in Computer -Mediated Communications, International Ⅱ. of Educational Telecommunications (2001) 7(3), 223-242
4Barry willis . Distance education at a glance [DB/OL].http://www.uidaho.edu/co/dist2.html#training.
5基更著,丁新译.远距离教育原理[M].北京:中央广播电视大学出版社,1999.
6Simpson. Orrnond-Support students in open and distance learning[M]. London: Kogan Page,2000.
7The Commonwealth of Learning. Creating learning materials for open and distance learning :A handbook for authors and instructional designers[DB/OL], http://www.col.org.
8Robert Heinich.Michael Molenda & James D.Russell,李文瑞译.教学媒体与教学新科技[M].台湾:心理出版社,1993.
9Moore M.G. Distance education: A system View[M] .Wadsworth:Publising Company, 1996.