@book { CorporateCitizenship,
    title = "Corporate Citizenship",
    author = "Kathrin {Segref}",
    year = "2004",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832485092",
    url = "https://m.diplom.de/document/223714"
}