@book{vonSpiegel1993,
  author    = {von Spiegel, Hiltrud},
  title     = {Aus Erfahrung lernen},
  edition   = {1, Aufl.},
  publisher = {Votum},
  address   = {M{\"u}nster},
  isbn      = {3-926549-80-7},
  pages     = {255 S.},
  year      = {1993},
  language  = {de}
}
@book{vonSpiegel2004,
  author    = {von Spiegel, Hiltrud},
  title     = {Methodisches Handeln in der Sozialen Arbeit},
  volume    = {8277},
  edition   = {1. Aufl.},
  publisher = {Reinhardt},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {3-8252-8277-5},
  pages     = {269 S. : graph. Darst.},
  year      = {2004},
  language  = {de}
}
@book{vonSpiegel2006,
  author    = {von Spiegel, Hiltrud},
  title     = {Methodisches Handeln in der Sozialen Arbeit},
  volume    = {8277},
  edition   = {2. Aufl.},
  publisher = {Reinhardt},
  address   = {M{\"u}nchen [u.a.]},
  isbn      = {978-3-497-016},
  pages     = {269 S. : graph. Darst.},
  year      = {2006},
  language  = {de}
}
@book{vonSpiegel1997,
  author    = {von Spiegel, Hiltrud},
  title     = {Offene Arbeit mit Kindern - (k)ein Kinderspiel},
  edition   = {1. Aufl.},
  publisher = {Votum},
  address   = {M{\"u}nster},
  isbn      = {3-930405-38-5},
  pages     = {243 S.},
  year      = {1997},
  language  = {de}
}