TY - JOUR AU - Saif, Mohammad Hasan AU - Fathi, Reza TI - A Causal Model of Acceptance and Utilization to Virtual Learning among Staffs: The Role Task-Technology Fit, self- Efficacy and Subjective Norm JO - Quarterly Journal of Training and Development of Human Resources VL - 4 IS - 12 SP - 1 EP - 10 PY - 2017 DO - ER -