@book { WohnzufriedenheitsmodellWZM,
    title = "Wohnzufriedenheitsmodell (WZM)",
    author = "Jürgen {Bauer}",
    year = "2021",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/999922"
}