APA (7th ed.) Citation

Garrison, D. R. (2003). E-learning in the 21st century: A framework for research and practice (1. publ.). RoutledgeFalmer.

Chicago Style (17th ed.) Citation

Garrison, D. Randy. E-learning in the 21st Century: A Framework for Research and Practice. 1. publ. London [u.a.]: RoutledgeFalmer, 2003.

MLA (9th ed.) Citation

Garrison, D. Randy. E-learning in the 21st Century: A Framework for Research and Practice. 1. publ. RoutledgeFalmer, 2003.