@book { KostenNutzenAnalysevonJugendhilfemanahmen,
    title = "Kosten-Nutzen-Analyse von Jugendhilfemaßnahmen",
    author = "Klaus {Roos}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099771"
}