@incollection{SchoopDellerFrey2007,
  author    = {U. Schoop and J{\"u}rgen Deller and Dieter Frey},
  title     = {Psychologie : Schl{\"u}ssel zum Verhandlungserfolg},
  isbn      = {3-621-27523-1},
  year      = {2007},
}