@book { OutsourcingmitLogistikDienstleistern,
    title = "Outsourcing mit Logistik-Dienstleistern",
    author = "Doris {Six}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832478377",
    url = "https://m.diplom.de/document/223095"
}