@book { VereinsamungundIsolationvonlterenimambulantenSetting,
    title = "Vereinsamung und Isolation von Älteren im ambulanten Setting",
    author = "Marc-Simon {Egeling}",
    year = "2019",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/491887"
}