@book { WohngruppenfrdementeltereMenschen,
    title = "Wohngruppen für demente ältere Menschen",
    author = "Karin {Hahn}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836640213",
    url = "https://m.diplom.de/document/227467"
}