@book { StudienzumBahtumEthischeAspektederSchrift,
    title = "Studien zum Bahā’ītum - Ethische Aspekte der Schrift",
    author = "Udo {Schaefer}",
    year = "2023",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1417644"
}