@book { JugendclubsanTheatern,
    title = "Jugendclubs an Theatern",
    author = "Herbert {Enge} and Marlis {Jeske} and Wolfgang {Schneider}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1080197"
}