@book { SocialWeb,
    title = "Social Web",
    subtitle = "Einfluss des Massenmediums Internet auf die Komponenten des Marketing-Mixes",
    author = "Rike {Ladwig}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842812956",
    url = "https://m.diplom.de/document/228453"
}