TY  - BOOK
AU  - Garrison, D. Randy
TI  - E-learning in the 21st century : a framework for research and practice
SN  - 9781138953567
U1  - 378.00285 GAR 
PY  - 2017///
CY  - New York
PB  - Routledge
N1  - Includes bibliographical references
ER  -