@book { PotentialeundGrenzenvonInternetportalenalsBeitragfrdasCustomerRelationshipManagementCRM,
    title = "Potentiale und Grenzen von Internetportalen als Beitrag für das Customer Relationship Management (CRM)",
    author = "Sebastian {Jandrey}",
    year = "2005",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638338479",
    url = "https://www.hausarbeiten.de/document/33351"
}