@book { NeueKonsumwelteninPolen,
    title = "Neue Konsumwelten in Polen",
    author = "Christoph {Breit}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832497590",
    url = "https://m.diplom.de/document/224833"
}