@book { PflegegradManagement,
    title = "Pflegegrad-Management",
    author = "Jutta {König}",
    year = "2018",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/428301"
}