@book { SumpfderSnde,
    title = "Sumpf der Sünde",
    subtitle = "Ein Fall für Bella Block 4 | Bandenkriege in Hamburg – und Kultermittlerin Bella Block mittendrin",
    author = "Doris {Gercke}",
    year = "2025",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/1401575"
}