共 36 条
[1]
Allen I. E., 2011, GOING DISTANCE ONLIN
[2]
Factors influencing university drop out rates
[J].
COMPUTERS & EDUCATION,
2009, 53 (03)
:563-574
[4]
Blom K., 2003, QUALITY INDICATORS V
[5]
Chen Lin, 2006, J NEIMENGGU RADIO TV, V3, P66
[6]
Cieslak DA, 2008, LECT NOTES ARTIF INT, V5211, P241, DOI 10.1007/978-3-540-87479-9_34
[7]
Doherty W., 2006, Internet and Higher Education, V9, P245, DOI 10.1016/j.iheduc.2006.08.004
[9]
Ji Zhe, 2008, OPEN ED RES, V14, P86
[10]
Jiang Yulan, 2006, J NINGBO RADIO TV U, V4, P50