@book { DieRolleeinerFhrungskraft,
    title = "Die Rolle einer Führungskraft",
    author = "Gabi {Ferenz}",
    year = "2007",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638584012",
    url = "https://www.hausarbeiten.de/document/66073"
}