@book { DieBedeutungdesCustomerRelationshipManagementimMarketingMixamBeispielderAutomobilindustrie,
    title = "Die Bedeutung des Customer Relationship Management im Marketing-Mix am Beispiel der Automobilindustrie",
    author = "Florian {Billion}",
    year = "2009",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836628938",
    url = "https://m.diplom.de/document/226750"
}