@book { DerMrderamHalfMoonGate,
    title = "Der Mörder am Half Moon Gate",
    author = "Andrea {Penrose} and Tobias {Eckerlein}",
    year = "2021",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/1040726"
}