@book { ErklrungsanstzefrAggressionundGewaltanSchulen,
    title = "Erklärungsansätze für Aggression und Gewalt an Schulen",
    author = "Nina {Junge}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640455126",
    url = "https://www.hausarbeiten.de/document/137143"
}