@book { EinfachdieSeelefreischreiben,
    title = "Einfach die Seele frei schreiben",
    author = "Sylvia {Winnewisser}",
    year = "2011",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403476"
}