4Saba,F.Evolution of Research in Distance Education:Challenges of the Online Distance Leaming Environment[A].2nd Conference on Research in Distance&Adult Learning in Asia[C/CD].Hong Kong:CRIDALA2002.2002.
5Saba,F.,Shearer,R.L.Verifying key theoretical concepts in a dynamic modd of distance education[J].The American Jourml of Distance Education,1994,8(1):36—59.
7Saba,Farhad.Why There is No“Significant Difference”Between Face—to—Face and Distance Education?[J].Distance Education Report,2000,4(13):12—16.
8Rick Shearer.No Significant Difference And Distance Education[DB/OL].http://www.distance-educator.com/de_ezine/arficle.php?sid=182.
9Saba,F.The Future of Distance Education:Research.Conceptual Development and Practice[DB/OL].www.uwex.edu/disted/conference//Resource library/proceedings/03_29.pdf.
10Saba,F.The Year Ahead:Conceptual Confusion in Distance Educadon[DB/OL].http:llwww.distance—educator.com/dnews/?nalTle=News&file=ardcle&fid=7412,2002-09-03.