@book { MedienundJugendschutzimInternet,
    title = "Medien- und Jugendschutz im Internet",
    author = "Andreas {Gottwald}",
    year = "2015",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    url = "https://www.hausarbeiten.de/document/307356"
}