@incollection{itb2768,
  author = {Gessler, Michael},
  editor = {M. Gessler},
  title = {Strukturmodell der Handlungsfelder},
  year = {2009},
  booktitle = {Handlungsfelder des Bildungs­managements: Ein Handbuch},
  pages = {13–37},
  publisher = {Waxmann},
}