@book { DieHypothekenkriseindenUSAundihreAuswirkungen,
    title = "Die Hypothekenkrise in den USA und ihre Auswirkungen",
    author = "Michael {Schlemmer}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836611039",
    url = "https://m.diplom.de/document/225666"
}