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7Michael G. Moore, Namin Shin. Speaking Personally/about Distance Education[Z]. Readings in Distance Education,2000, (6).
8Gunawardena, et al .Learner-lnterface Interaction in Distance Education: An Extension of Contemporary Models and Strategiesfor Practitioners[J].The American Journal of Distance Education,1994,8(2):30-42.
9Randy Garrison. Theoretical Challenges for Distance Education in the 21st Century: A Shift from Structural to Transactional Issues[DB/OL].http://www.irrodl.org/content/v1.1/randy.pdf
10Taylor,J C,Novex Analysis: A cognitive science approach to instructional design [J]. Educational Technology, 1994,34(5): 5-13.
