@book { Elternarbeit,
    title = "Elternarbeit",
    author = "Brigitte {Spörr}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836611022",
    url = "https://m.diplom.de/document/225665"
}