@book { AmoklaufWarumbegehenJugendlicheinSchulenAmoklufe,
    title = "Amoklauf - Warum begehen Jugendliche in Schulen Amokläufe?",
    author = "Hanna {Horn}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297024"
}