@book { ExterneUnternehmensPRimWorldWideWeb,
    title = "Externe Unternehmens-PR im World Wide Web",
    author = "Kerstin {Radke}",
    year = "2002",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638157414",
    url = "https://www.hausarbeiten.de/document/8900"
}