@book { UmgangmitgeistigBehinderteninderGesellschaft,
    title = "Umgang mit geistig Behinderten in der Gesellschaft",
    author = "Friederike {Frach}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/223349"
}