@book { DarfichDirdasSieanbieten,
    title = "Darf ich Dir das Sie anbieten?",
    author = "Nora {Knappe}",
    year = "2020",
    publisher = "Omnino Verlag",
    address = "Berlin, Deutschland",
    url = "https://shop.omnino-verlag.de/document/590388"
}