@book { DiePflegebranchevorHerausforderungen,
    title = "Die Pflegebranche vor Herausforderungen",
    author = "David {Wolf}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640772636",
    url = "https://www.hausarbeiten.de/document/162255"
}