@book { DiePflegetheorievonLydiaEloiseHall,
    title = "Die Pflegetheorie von Lydia Eloise Hall",
    author = "Andreas {Karsch}",
    year = "2001",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640000340",
    url = "https://www.hausarbeiten.de/document/101621"
}