References
- GARRISON , D.R. 1990 . An analysis and evaluation of audio teleconferencing to facilitate education at a distance . The American Journal of Distance Education , 4 ( 3 ) : 13 – 24 .
- MOORE , M.G. 1994 . Audioconferencing in Distance Education . The American Journal of Distance Education , 8 ( l ) : 1 – 4 .