@book { RechnungslegungderKatholischenKirche,
    title = "Rechnungslegung der Katholischen Kirche",
    author = "Eckhard M. {Thomes}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1101450"
}