@book { DasaufrechteHerzderLady,
    title = "Das aufrechte Herz der Lady",
    author = "Dorothea {Stiller}",
    year = "2021",
    publisher = "dp DIGITAL PUBLISHERS GmbH",
    address = "Stuttgart, Deutschland",
    url = "https://shop.digitalpublishers.de/document/1006551"
}