The concept map to the text can be found here: https://gitmind.com/app/doc/4c250d161a49ae814978fe959495bdc3
or in PDF critical inquiry model.pdf
Garrison, D. R., Anderson, T., & Archer, W. (2000). Critical Inquiry in a Text-Based Environment: Computer Conferencing in Higher Education. The Internet and Higher Education, 2, 87-105.
http://dx.doi.org/10.1016/S1096-7516(00)00016-6