@book { KriseninterventionundPrvention,
    title = "Krisenintervention und Prävention",
    author = "Christiane {Lang}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832431044",
    url = "https://m.diplom.de/document/218811"
}