4Rourke,L,Anderson,T, Garrison,R.and Archer, W.. Methodological issues in the content analysis of computer conference transcripts International[J]. Journal of Artificial Intelligence in Education,2000,(12).
5Wimmer,R.D.,Dominck,J.R.(金兼斌等译).Mass Media Research:Anintroduction[M].北京:清华大学出版社,2005:150-170.
6kerlinger, EN. Foundations of Behavioral Research(4th)[M]. New York: Holt,Rinehart&Winston. 2000.
7Michael Singletary(刘燕南主译).Mass Communication Research-contemporary Methods and Applications[M]. 北京:华夏出版社,2000:287-290.