@book { MenschenbilderundMenschenbildung,
    title = "Menschenbilder und Menschenbildung",
    author = "Urs {Thurnherr}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1099051"
}