@book { NeueMedienSozialeOnlineNetzwerke,
    title = "Neue Medien. Soziale Online Netzwerke",
    author = "Miri {Unger}",
    year = "2012",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783656209874",
    url = "https://www.hausarbeiten.de/document/195150"
}