@book { PatientenServiceimKrankenhaus,
    title = "Patienten-Service im Krankenhaus",
    author = "René A. {Bostelaar} and Christina {Kießling}",
    year = "2010",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403681"
}