@book { BankberatungimInternet,
    title = "Bankberatung im Internet",
    author = "Brigitte {Haider}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832422219",
    url = "https://m.diplom.de/document/218043"
}