| List I | List II | ||
| A | Noodle Tools | 1 | a free service for managing and Discovering scholarly |
| B | CiteULike | 2 | Integrated tools of note-taking |
| C | EndNote | 3 | Free Reference manager and academic social network |
| D | Mendeley | 4 | A commercial reference management software package |
1
A-2, B-1, C-4, D-3
2
A-3, B-1, C-4, D-2
3
A-1, B-2, C-4, D-3
4
A-3, B-1, C-2, D-4