@book { OwnedbytheMafiaKing,
    title = "Owned by the Mafia King",
    subtitle = "Eine spicy Dark Mafia Romance",
    author = "Grace C. {Stone}",
    year = "2026",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/1730962"
}