Style de citation APA

Garrison, D. R. (2017). E-learning in the 21st century: A community of inquiry framework for research and practice (Third edition.). Routledge.

Style de citation Chicago

Garrison, D. R. E-learning in the 21st Century: A Community of Inquiry Framework for Research and Practice. Third edition. New York: Routledge, 2017.

Style de citation MLA

Garrison, D. R. E-learning in the 21st Century: A Community of Inquiry Framework for Research and Practice. Third edition. Routledge, 2017.