@book { ACaseAnalysisExploringCustomerAttitudesonBMW,
    title = "A Case Analysis - Exploring Customer Attitudes on BMW",
    author = "Marion {Maguire, geb. Weiler}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832493301",
    url = "https://m.diplom.de/document/224451"
}