@book{Grunwald2013,
  author    = {Grunwald, Guido},
  title     = {{\"U}bungen zur angewandten Marktforschung},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {978-3-486-73446-1},
  pages     = {127},
  year      = {2013},
  language  = {de}
}
@book{GrunwaldSchwill2019,
  author    = {Grunwald, Guido and Schwill, J{\"u}rgen},
  title     = {Toolbox Marketing : Praxiserprobte Werkzeuge f{\"u}r die gelungene Marketingarbeit},
  publisher = {Sch{\"a}ffer-Poeschel},
  address   = {Stuttgart},
  isbn      = {978-3-7910-4344-9},
  pages     = {215},
  year      = {2019},
  language  = {de}
}
@book{Grunwald2012,
  author    = {Grunwald, Guido},
  title     = {REACH und CSR : mehr Reputation durch Nachhaltigkeit in kleinen und mittleren Unternehmen},
  publisher = {Eul},
  address   = {Lohmar},
  isbn      = {978-3-8441-0129-4},
  pages     = {108},
  year      = {2012},
  language  = {de}
}
@book{Grunwald2013,
  author    = {Grunwald, Guido},
  title     = {Garantien als Marketinginstrument : Wirkungs- und Entscheidungsanalyse},
  publisher = {Eul},
  address   = {Lohmar},
  isbn      = {978-3-8441-0226-0},
  pages     = {97},
  year      = {2013},
  language  = {de}
}
@book{GrunwaldSchwill2017,
  author    = {Grunwald, Guido and Schwill, J{\"u}rgen},
  title     = {Beziehungsmarketing : Gestaltung nachhaltiger Gesch{\"a}ftsbeziehungen - Grundlagen und Praxis},
  publisher = {Sch{\"a}ffer-Poeschel},
  address   = {Stuttgart},
  isbn      = {978-3-7910-3522-2},
  pages     = {361},
  year      = {2017},
  language  = {de}
}
@book{Grunwald2012,
  author    = {Grunwald, Guido},
  title     = {Angewandte Marktforschung : eine praxisorientierte Einf{\"u}hrung},
  publisher = {Oldenbourg},
  address   = {M{\"u}nchen},
  isbn      = {978-3-486-71338-1},
  pages     = {162},
  year      = {2012},
  language  = {de}
}
@book{Grunwald2017,
  author    = {Grunwald, Guido},
  title     = {Angewandte Marketinganalyse : praxisbezogene Konzepte und Methoden zur betrieblichen Entscheidungsunterst{\"u}tzung},
  publisher = {De Gruyter Oldenbourg},
  address   = {Berlin},
  isbn      = {978-3-11-037172-7},
  pages     = {440},
  year      = {2017},
  language  = {de}
}