@book { DeinGlckstirbtin4Tagen,
    title = "Dein Glück stirbt in 4 Tagen",
    author = "Marcus {Ehrhardt}",
    year = "2019",
    publisher = "via tolino media",
    address = "München, Deutschland",
    url = "https://tolino.openpublishing.com/document/995486"
}