@incollection{HartoghKehrerWickel2014,
  author    = {Theo Hartogh and Eva Kehrer and Hans Hermann Wickel},
  title     = {Music Geragogics - Making Music with the Elderly},
  booktitle = {Damien Sagrillo \& Dieter Ferring (Hrsg.): Music (Education) from the Cradle to the Grave},
  isbn      = {978-3-8236-1687-0},
  year      = {2014},
}