@book { AufgabenundAnstzedesCustomerRelationshipManagementsimIndustriegtermarketing,
    title = "Aufgaben und Ansätze des Customer Relationship Managements im Industriegütermarketing",
    author = "Christoph {Weigel}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640971862",
    url = "https://www.hausarbeiten.de/document/176041"
}