TY  - GEN
AU  - Ruhe, Valerie
AU  - Zumbo, Bruno D
TI  - Evaluation in Distance Education and E-Learning : : The Unfolding Model
PY  - 2009///
PB  - THE Guilford Press
KW  - Distance Education
KW  - E-Learning
KW  - Web-based learning
KW  - Computer-assisted instruction
ER  -