| Verfasser | Häufigkeit |
| Russell, Susan |
32 |
| American Society for Training and Development |
3 |
| Ann-Margret 1941- |
3 |
| Aris, Ben |
3 |
| Baker, Jennifer |
3 |
| Baker, Susan |
3 |
| Bickley, Susan 1955- |
3 |
| Brown, Arthur |
3 |
| Holland, Mary |
3 |
| Nicholas, Paul |
3 |
| Nicholson, Jack 1937- |
3 |
| Russell, Victoria |
3 |
| Turner, Tina 1939-2023 |
3 |
| Winch, Barry |
3 |
| Bush, Dick 1931-1997 |
2 |
| Cullagh, Majella 1972- |
2 |
| Gavin, John |
2 |
| Gregory, Gillian |
2 |
| Kohner, Susan |
2 |
| Metty, Russell |
2 |