@book { InternetarbeitinderJugendarbeit,
    title = "Internetarbeit in der Jugendarbeit",
    author = "Christian {Persch}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832408060",
    url = "https://m.diplom.de/document/216711"
}