@book { Dafristmanniezualt,
    title = "Dafür ist man nie zu alt",
    subtitle = "Eine Erzählung",
    author = "Gabriella {Engelmann}",
    year = "2016",
    publisher = "jumpbooks",
    address = "München, Deutschland",
    url = "https://www.jumpbooks.de/document/318572"
}