1
Published: London u.a. : Longman, 1991
Book
2
Published: Frankfurt am Main : Isp-Verl, 1990.
Book
3
Book
4
Published: Berlin : Sozialpolitischer Verlag SPV [u.a.], 1979.
Book
5
Published: Opladen : Westdt. Verl, 1994
Book
6
Book
7
Published: London u.a. : Longman, 1993.
Book