@book { PersnlicheAssistenz,
    title = "Persönliche Assistenz",
    author = "Conny {Müller}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836646086",
    url = "https://m.diplom.de/document/227761"
}