@book { MarketingWiefllenKonsumentenKaufentscheidungen,
    title = "Marketing: Wie fällen Konsumenten Kaufentscheidungen?",
    author = "Fabian {Stern}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296640"
}