@book { GrenzsituationeninderPflege,
    title = "Grenzsituationen in der Pflege",
    author = "Ursula {Hogrefe}",
    year = "2006",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638546201",
    url = "https://www.hausarbeiten.de/document/61093"
}