1
Ruggiero, Vincent Ryan.
| Longman |
1998
3
Udoff, Alan,
| L. Rienner Publishers |
1991
7
Sch?n, Donald A.
| Basic Books |
1983
8
Brownhill, R. J.
| Croom Helm |
1983
10
Harding, Denys Clement Wyatt,
| Cambridge University Press |
1982