@book { UmgangmitverbalerGewaltanSchulen,
    title = "Umgang mit verbaler Gewalt an Schulen",
    author = "Talha { Mutluel}",
    year = "2015",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/295792"
}