@book{LinssenLitzckeMaffenbeieretal.2012,
  author    = {Linssen, R. and Litzcke, S. M. and Maffenbeier, S. and Schilling, J.},
  title     = {Korruption: Risikofaktor Mensch. Wahrnehmung - Rechtfertigung - Meldeverhalten},
  publisher = {Springer VS},
  address   = {Wiesbaden},
  year      = {2012},
  language  = {mul}
}
@book{LittkemannHoltupSchulte2012,
  author    = {Littkemann, J. and Holtup, M. and Schulte, K.},
  title     = {Buchf{\"u}hrung: Grundlagen - {\"U}bungen - Klausurvorbereitung},
  edition   = {5. Aufl.},
  publisher = {Gabler},
  address   = {Wiesbaden},
  isbn      = {978-3834934178},
  year      = {2012},
  language  = {mul}
}
@book{Strassner2012,
  author    = {Strassner, C},
  title     = {Sektoranalyse Außer-Haus-Markt Schwerpunkt Gemeinschaftsverpflegung.},
  volume    = {Band 2},
  editor    = {Roehl, R.},
  address   = {M{\"u}nster},
  pages     = {40 S.},
  year      = {2012},
  language  = {mul}
}