@book { eCRMimKontextdesInternetmarketinginJapan,
    title = "eCRM im Kontext des Internetmarketing in Japan",
    author = "Christian {Schulz}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832468613",
    url = "https://m.diplom.de/document/222205"
}