@book { BeratungvonJugendlichen,
    title = "Beratung von Jugendlichen",
    author = "Renate {Haack-Wegner} and Klaus {Helmken} and Anne {Grotrian}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1108276"
}