@book { FokusEpidemiologieundPflege,
    title = "Fokus: Epidemiologie und Pflege",
    author = "Prof. Dr. Sabine {Bartholomeyczik} and MScN, Cleo R. {Nonn}",
    year = "2010",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403641"
}