@book { CustomerRelationshipManagementforLuxurySkinCareBrandsintheSelectiveCosmeticsSector,
    title = "Customer Relationship Management for Luxury Skin Care Brands in the Selective Cosmetics Sector",
    author = "Tanja {Walker}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Germany",
    doi = "10.3239/9783832481285",
    url = "https://m.diplom.de/document/223353"
}