1
Smith, Cyril Stanley,
| MIT Press |
1981
4
Merriam, Sharan B.
| Jossey-Bass |
1988
6
Guba, Egon G.
| Jossey-Bass Publishers |
1981
7
Duronio, Margaret A.,
| Jossey-Bass |
1991
8
Duronio, Margaret A.,
| Jossey-Bass |
1991
9
Wlodkowski, Raymond J.
| Jossey-Bass Publishers |
1985
10
Wlodkowski, Raymond J.
| Jossey-Bass Publishers |
1985