@incollection{Merchel2005,
  author    = {Joachim Merchel},
  title     = {Planung},
  booktitle = {Handbuch Sozialarbeit/Sozialp{\"a}dagogik},
  edition   = {3. Aufl.},
  isbn      = {978-3-497-018},
  year      = {2005},
}