@book { KirchengeschichteAlteundneueWege,
    title = "Kirchengeschichte. Alte und neue Wege",
    author = "Gisela {Fleckenstein} and Michael {Klöcker} and Norbert {Schloßmacher}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1105198"
}