@book { AnalysederZufriedenheitvonMietern,
    title = "Analyse der Zufriedenheit von Mietern",
    author = "Yvonne {Lachmund}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832441241",
    url = "https://m.diplom.de/document/219748"
}