@book { UnternehmenskommunikationimInternet,
    title = "Unternehmenskommunikation im Internet",
    author = "Radka {Senger}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832408701",
    url = "https://m.diplom.de/document/216773"
}