@book { AggressionenundihreVerminderungsmglichkeiten,
    title = "Aggressionen und ihre Verminderungsmöglichkeiten",
    author = "Jonny {Gudd}",
    year = "2010",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640722891",
    url = "https://www.hausarbeiten.de/document/158717"
}