@book { Lemarketingrelationneldanslesecteurduluxe,
    title = "Le marketing relationnel dans le secteur du luxe",
    author = "Alice {Haupt}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832498955",
    url = "https://m.diplom.de/document/225012"
}