@book { DemografischerWandelberdieBedeutungdesAltersineineralterndenGesellschaft,
    title = "Demografischer Wandel: Über die Bedeutung des Alters in einer alternden Gesellschaft",
    author = "Sarah {Wölke}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296804"
}