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1 Frankola, K, "Why online learners drop out" 2001
2 Knowledgenet, "Who’s not e-learning and why" 2 (2): 2001
3 Driscoll,M, "Web-based training" Jossey-Bass/Pfeiffer 1998
4 Tabachnick, B. G.,, "Using multivariate statistics" Harper Collins College Publishers 1996
5 Jun, J, "Understanding the factors of adult learners dropping out of e-learning courses" 279-284, 2004
6 Stockholm, "The teaching process and study dropout in adult education Stockholm Institute of Education" 1978
7 Chyung, S. Y, "Systemic effects of improving the motivational appeal of online instruction on adult distance education" 2001b
8 King, J. E, "Running a best-subsets logistic regression" 63 (63): 392-403, 2003
9 Kember,D, "Open learning courses for adults" Eduational Technology Pubulications 1995
10 Chyung, S. Y., "Improve the motivational appeal of online instruction for adult learners" 2000
11 Osborn, V., "Identifying at-risk students in video conferencing and web-based distance education" 15 (15): 41-54, 2001
12 Vrasidas, C.,, "Factors influencing interaction in an online course" 13 (13): 22-36, 1999
13 Vrasidas, C.,, "Factors influencing interaction in an online course" 13 (13): 22-36, 1999
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17 Frontline Group, "Building a culture that supports and encourages E-learning" 2001
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19 Hosmer, D. W.,, "Applied logistic regression" Wiley & Sons 2000
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