@book { ModelleundTheorieninderPflege,
    title = "Modelle und Theorien in der Pflege",
    author = "Silvia {Neumann-Ponesch}",
    year = "2021",
    publisher = "facultas",
    address = "Wien, Österreich",
    url = "https://campus-lizenzen.facultas.at/document/1470116"
}