1. Factors affecting the adoption of e-books by information professionals;Aharony;Journal of Librarianship and Information Science,2015
2. Cluster analysis;Aldenderfer,1984
3. What do we want teaching materials for?;Allwright;ELT Journal,1981
4. Cluster analysis for applications;Anderberg,1973
5. Organization Development: The progress of leading organizational change;Anderson,2017