@book { InternetNutzungundAngstvorAnonymittsverlust,
    title = "Internet-Nutzung und Angst vor Anonymitätsverlust",
    author = "Claudia {Hammer}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832447076",
    url = "https://m.diplom.de/document/220311"
}