@book { AktuelleEntwicklungeninderPflegebranche,
    title = "Aktuelle Entwicklungen in der Pflegebranche",
    author = "Daniel {Zäck}",
    year = "2013",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656350262",
    url = "https://www.hausarbeiten.de/document/207778"
}