@book { ZurSituationalleinstehenderMenscheninunsererGesellschaft,
    title = "Zur Situation alleinstehender Menschen in unserer Gesellschaft",
    author = "Ines {Leitner}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/216138"
}