@book { Pflegestufenmanagement,
    title = "Pflegestufenmanagement",
    author = "Birger {Schlürmann} and Karla {Kämmer}",
    year = "2014",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403917"
}