4Borg, W., and M. Gall. The methods and tools of observational research. In Educational research: An introduction (5th ed). eds. W. Borg and M. Gall, 473-530. London: Longman. 1989.
5Bales, R. F.. Interaction Process Analysis: A Method for the Study of Small Groups. Cambridge, MA: Addison-Wesley Press. 1950
6Anderson, T., Rourke, L., Garrison, D.R. & Archer, W. Assessing teaching presence in a computer confereneing context. Paper presented at the annual meeting, American Educational Research Association, Seattle, April 2001 10 - 14.
7D. Randy Garrison, Terry Anderson, and Walter Archer ,Critical Thinking, Cognitive Presence, and Computer Conferencing in Distance Education 2004
8Garrison, D,, Anderson, T. and Archer, W. Critical Thinking and Computer Conferencing: A Model and Tool to Assess Cognitive Presence http://www.atl.ualberta.ca/cmc/CogPresPaper_June30_.pdf
9C. Candace Chou , A Comparative Content Analysis of Student Interaction in Synchronous and Asynchronous Learning Networks
10Chou, C. C. From simple chat to virtual reality: Formative evaluation of computer-mediated communication systems for synchronous online learning. Paper presented at the WebNet99: World Conference on Internet and WWW, Honolulu, HI. 1999
