@book { AltersarmutinDeutschlandHerausforderungfrdieSozialpolitik,
    title = "Altersarmut in Deutschland: Herausforderung für die Sozialpolitik",
    author = "Nick {Loetz}",
    year = "2015",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/297537"
}