@book { TintaNachtigallerobertalleHerzen,
    title = "Tinta Nachtigall erobert alle Herzen",
    author = "G. S. {Friebel}",
    year = "2019",
    publisher = "Uksak E-Books",
    address = "Lengerich, Germany",
    url = "https://uksakebooks.grin.com/document/498874"
}